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Experts in organic synthesis like to keep an eye on certain compounds that make regular appearances in new drug molecules and fresh research papers. Ethyl 3-aminocrotonate deserves some attention here. Early work with aminocrotonates goes back to foundational research into synthetic routes for pyridines and related heterocycles—basically, the backbone chemistry for a lot of pharmaceuticals. Chemists in the early-to-mid 20th century soon realized Ethyl 3-aminocrotonate opened up more options for targeted molecular complexity, especially as drug design began to focus on fine-tuning bioactive structures. Its adaptability and reactivity meant it didn’t stay locked up in the classics, but instead helped shape whole research areas, from vitamin B6 analogues to anti-infective agents.
A bottle of Ethyl 3-aminocrotonate usually sits near the other amine and enamine reagents in any decent organic lab. It looks harmless—often a clear or faintly yellowish liquid—but the possibilities it uncorks have drawn plenty of researchers. Today, chemical companies sell it worldwide, and anybody making fine chemicals, drug development leads, or new agrochemicals has likely handled it at one time or another. In plain speech, it’s that useful kind of chemical that doesn’t attract headlines but shows up in patents and research papers when people are out to make something no one else has stumbled into yet.
Real-world experience with Ethyl 3-aminocrotonate tells you it has an oily feel and a noticeable, slightly fishy odor that’s a dead giveaway for open bottles. It’s pretty stable as a liquid at room temperature, but evaporation will carry that smell across the room. Solubility is no issue when dealing with most organic solvents—common choices like ethanol, ether, and methanol work just fine. Water doesn’t take it up well, which helps during work-ups. The double bond and amine function make this substance unpredictable in the presence of acids, while strong bases and nucleophiles tend to shift things into new territory. That’s part of its draw—such a compact molecule offering up a reactive amine and alkene at once.
Chemists who have handled this know that documentation often puts the purity at 98% or better; trace impurities sometimes mess up sensitive reactions, so quality sources matter. Standard packaging uses amber bottles to shield it from light, since sunlight can trigger slow breakdown. Labels should specify content, batch number, and basic hazard statements, which, in practical settings, often mean gloves and goggles during pouring or measuring. In my own experience, samples straight from reputable suppliers cut out headaches during method development. Reproducibility gets harder with older or poorly stored samples.
Old manuals and lab write-ups show that synthesis tends to begin with Ethyl acetoacetate, a staple for countless organics practitioners. Amidation with ammonia or relevant amines produces the title compound—though real yields depend on careful control of temperature and exclusion of moisture. Some methods take advantage of azeotropic distillation to keep things dry, while others lean on more modern, mild acid catalysis to steer the reaction away from byproduct formation. My own experience: getting large-scale, clean Ethyl 3-aminocrotonate often comes down to fresh reagents, tight temperature management, and a willingness to pay for better starting material.
Nobody working with Ethyl 3-aminocrotonate can miss how readily it steps into cyclization schemes. Domeier and Knoevenagel reactions spring to mind first. By pairing it with electrophiles or participating in Michael additions, you get cycles like 2-pyridones or functionalized piperidines. This utility reaches deep into medicinal chemistry, since making nitrogen-containing rings efficiently opens up paths to new molecular scaffolds. The enamine tautomer switches things up with electrophilic or nucleophilic partners. In the hands of even half-skilled chemists, modification comes easy—N-alkylation for instance, yields many derivatives that can lead to new screening libraries for pharmaceutical hits.
Buyers and researchers might encounter Ethyl 3-aminocrotonate listed as Ethyl 3-aminobut-2-enoate or Crotonic acid, 3-amino-, ethyl ester. I’ve seen it pop up in catalogs as Ethyl (E)-3-aminocrotonate or under modest “enamine ester” groupings. The underlying structure never changes, but naming conventions differ in journals and supplier indices—so anyone juggling multiple sources should double-check CAS numbers, which tend to stay constant where names do not.
Having handled this compound, everyone knows to take precautions. It can sting if it hits the skin, and inhalation brings about mild respiratory irritation. Fume hoods aren’t optional when weighing or transferring, especially in poorly ventilated spaces. Old habits like keeping a box of gloves handy and labeling waste containers carefully never go out of style for chemicals with an amine group. Companies adhering to modern chemical safety audits will keep Material Safety Data readily available for reference. Local regulations differ—some treat it as a low-level irritant, others flag it for aquatic toxicity based on amine content.
You find Ethyl 3-aminocrotonate all over synthetic methodology research, thanks to its versatility in ring construction and side-chain introduction. Medicinal chemists rely on it for rapid assembly of new heterocycles, especially those needed when exploring new kinase inhibitors or anti-inflammatory leads. Agrochemicals R&D leans on it for routes toward plant growth regulators and pesticide precursors. In graduate school, our group actually used it during exploration of vitamin B6 analogues aimed at epilepsy research, proving its utility across both basic science and translational applications. Some fine chemical producers employ it to build up more complex amines by staged transformation, offering greater route flexibility in scale-up projects.
Ongoing development with this compound tends to center on sustainable methods and new functionalization reactions. Catalysis teams keep seeking greener ways to produce it—lower energy routes, fewer byproducts, milder reaction conditions. Drug discovery efforts push synthetic methods that add new substituents to the nitrogen or the terminal alkene, aiming for fresh activity profiles. Collaboration between academic researchers and industry has resulted in combinatorial libraries featuring Ethyl 3-aminocrotonate as a key core, plugged into high-throughput screens for antimicrobial or CNS-active properties. Recent work also touches on using it as a handle for peptide modifications, which could signal a move towards more applications in bioconjugation, given the right chemistry.
Attention to toxicity never falls by the wayside with compounds that end up in pharmaceutical labs. There’s an understanding that Ethyl 3-aminocrotonate poses moderate risks—irritant to skin, eyes, and airways—though no strong data exists pointing to systemic toxicity in mammals at research-level exposures. Environmental scientists have begun evaluating the breakdown products, especially the concern about nitrogenous compounds leaking into waterways. With the push for greener chemistry, further study into low-dose, chronic exposure outcomes seems warranted, as usage in larger-scale manufacturing ramps up. Lessons from similar compounds tell us regular human or ecosystem contact should stay minimized, and proper disposal practices make a difference in long-term environmental impact.
Looking forward, the future for Ethyl 3-aminocrotonate lies in its adaptability. As automation and AI shape synthetic route development, its simple yet reactive scaffold will likely become part of predictive chemical libraries, allowing rapid generation of new candidate molecules for drug and material science. Methods reducing waste, energy use, and hazard profiles will attract attention in scaling production, especially with the shift to environmentally conscious manufacturing. Its track record for aiding heterocycle construction ensures it won’t be replaced easily. New cross-coupling or functional group manipulation technologies might open more doors, and as regulations around amine emissions tighten, safer and more efficient processing will become central to its continued relevance.
Ethyl 3-aminocrotonate stands out as a building block in organic chemistry labs around the world. Its value comes from a compact structure—a simple halo of carbon, oxygen, and a single nitrogen—that lets chemists create all sorts of complex molecules. You won’t spot it sitting on drugstore shelves or mentioned on personal care labels. This compound stays tucked away in the toolkit of researchers, fueling both academic discovery and industrial innovation.
If you’ve ever delved into synthetic organic chemistry, this molecule probably cropped up during familiar lecture slides or the reagents cupboard in grad school. Pharmaceutical scientists reach for ethyl 3-aminocrotonate when designing new drugs, especially when synthesizing pyrimidines or other heterocycles. These rings form the backbone of several antiviral medicines, including drugs developed for fighting HIV and hepatitis C. By tweaking this core molecule, chemists can produce variations that might help block viral replication, ease autoimmune conditions, or inhibit cancer growth.
A major appeal comes from the way this compound spurs useful reactions with fewer byproducts cluttering up the flask. Synthesis cooks down to efficiency and cleanliness—you want to build smart, not just fast. Using ethyl 3-aminocrotonate often means fewer purification headaches. Lab techs and scientists get sharper, more reliable results, and the costs stay lower for both research firms and universities.
Beyond medicine, manufacturers use this compound to create dyes, fragrances, and agricultural products. Here, it lends itself to creating molecules with bright colors or unique scents. Farmers benefit indirectly, too, from custom pesticides or herbicides tailored at the molecular level. The ripple reaches broad society, shaping basic materials that touch countless parts of daily life.
Chemicals like this always demand respect in the lab. During my own time in research, strict goggles-and-gloves routines kept us all safer. Handling procedures taught me an appreciation for the real risks that exist even among “boring” precursors. A minor lapse could spark allergic responses, skin burns, or worse. Most labs set up dedicated fume hoods and follow tight waste disposal rules. Chemists learn these steps by heart early on, and the culture of diligence means fewer incidents, and stronger evidence that safety claims rest on shared experience.
Not long ago, organic labs relied on processes heavy with waste and energy use. The industry shifts now toward smarter, leaner reaction strategies. Ethyl 3-aminocrotonate fits into this trend, since reactions involving it tend to work under relatively milder temperatures and often need less toxic reagents. Research teams now chase greener solvents or seek pathways to recycle spent materials. Smaller spills, lower emissions, and safer air help not just the planet but future students and techs who take up the trade.
Lab science gets much of its punch not from splashy gadgets but from quietly powerful chemicals like ethyl 3-aminocrotonate. In every small bottle, there’s the pressure and promise of new cures and smarter materials. Each experiment tells a story—of risk, opportunity, and the constant push to balance progress with responsibility. This compound reminds chemists that even routine reagents, used wisely, can power the next breakthrough.
Ethyl 3-aminocrotonate has the formula C6H11NO2. The compound starts with a simple carbon backbone, includes an amino group, and ends up as a staple in many advanced organic synthesis labs. Not everyone bumps into this one at the pharmacy or supermarket, but if you use common pain relievers or some blood-pressure medications, there’s a solid chance derivatives of this molecule had something to do with getting the right molecules into those drugs.
It can feel over-technical laying out letters and numbers like it’s a secret code, but a chemical formula lets scientists and manufacturers work with precision and safety. With C6H11NO2, you break it down into 6 carbons, 11 hydrogens, 1 nitrogen, and 2 oxygens—a format that translates across languages, countries, and industries. I’ve worked alongside researchers staring at sheets of reactions, and a small mistake in the formula means a failed batch or a lab disaster. No one needs that.
The real value lies in making things predictable. Say you’re scaling a reaction for a small start-up lab. Having the right formula makes it clear what should go into the reaction vessel, and prevents confusion that leads to wasted resources and long hours trying to figure out where things went sideways.
Anyone producing pharmaceuticals or doing medicinal chemistry will tell stories about “building blocks.” Ethyl 3-aminocrotonate stands out as one of them. Its structure—especially that amino group on the carbon chain—lets scientists build more complex molecules needed for treating disease. I watched a team working late to tweak a synthetic pathway for a new antibiotic, and they turned to this very molecule to get the reactivity just right. It’s not glamorous, but it’s essential.
Beyond the stories in the lab, having clear and accurate information about chemical substances lines up with public safety and environmental care. Mixing up acids and bases can set off dangerous reactions, so keeping the proper chemical formula front and center helps keep people safe.
Chemicals like ethyl 3-aminocrotonate often float through distribution channels that don’t double-check what’s in each barrel. Clerical errors or rushed paperwork have led to labs receiving mislabeled materials, sometimes with near-misses that endanger workers. It’s not science-fiction. Documentation mistakes lead to headaches and, at worst, immediate calls to emergency response teams.
The answer isn’t just more paperwork—it’s better training, solid labeling, and reliable databases. Lots of younger chemists I know use phone apps that scan QR codes linked to compound databases. That small shift prevents confusion and locks in traceability. Updating regulations helps, but a change in workplace culture where safety trumps speed makes the real difference.
A molecule like C6H11NO2 does more in the background than most people realize. From developing reliable medications to running smooth lab operations, knowing exactly what you’re working with makes tough research a little safer and a lot more productive. Specific, accurate chemical formulas won’t make headlines, but they steer science and medicine in the right direction every day.
Every chemistry enthusiast faces names that ring technical but hide stories bridging classrooms and research benches. Ethyl 3-Aminocrotonate comes up across organic synthesis, often starring as a versatile building block in the world of pharmaceuticals and bioactive molecules. Collecting the right data about it, such as molecular weight, is more than a box-ticking exercise. Anyone handling synthesis, formulation, or quality control needs this figure for precise calculations and accurate batch outcomes.
Let’s break it down: Ethyl 3-Aminocrotonate has a formula of C7H13NO2. Calculating molecular weight draws on atomic masses — carbon (12.01), hydrogen (1.01), nitrogen (14.01), and oxygen (16.00). Summing these, you land at a molecular weight of roughly 143.18 g/mol. This number is a passport for Ethyl 3-Aminocrotonate as it crosses from theory to lab work, dictating how researchers weigh out reagents, establish reaction stoichiometry, and interpret results.
I spent hours in undergrad laboratories watching classmates mix chemicals by sight or rough estimate, then scramble to troubleshoot why nothing worked as expected. A sloppy assumption with molecular weight leaves a chain of confusion. For Ethyl 3-Aminocrotonate, using 143.18 g/mol means your solution concentrations fall where you want them. Anyone developing a pharmaceutical candidate understands the need for precision — a miscalculation at this stage sets up failure down the line, whether in purification or bioactivity testing.
Quality scientific work leans on data that stands up to scrutiny. You’ll spot reputable chemical suppliers, academic chemistry guides, and open databases all aligning on this molecular weight. This isn’t just theoretical hair-splitting. Chemists record and cross-check the value because discrepancies mean wasted resources, spoiled experiments, or even hazardous situations if larger batches go astray. Trust in chemistry gets built molecule by molecule, number by number.
Error-proofing laboratory protocols grows simpler with modern software and digital inventory systems. These let chemists save critical information like molecular weights, so they’re not juggling mental math when setting up a reaction. Still, every chemical user benefits from double-checking numbers the old-school way, by re-calculating and confirming with at least two sources. An open culture of cross-verification goes further than any label or certificate. If anything seems off, a quick manual check using atomic masses resets the process to a more reliable baseline.
Someone new to a research team can easily overlook something as basic as a molecular weight, not realizing the ripple effect from one misstep. Careful handling of values like that for Ethyl 3-Aminocrotonate delivers cleaner data, smoother scaling from lab to industry, and fewer headaches chasing avoidable errors. This habit reflects broader best practices — keep things transparent, check details, and trust but verify. Every well-run lab and research project succeeds on these small, careful choices. Precision in molecular weights makes the difference between guesswork and science you can stand behind.
People working in synthetic chemistry labs come across Ethyl 3-Aminocrotonate pretty often. It finds use in building blocks for pharmaceuticals and agrochemicals. This isn't the usual solvent or salt you throw in a cupboard. One mistake and you’re not only risking a ruined experiment—you’re flirting with real hazards. Years of handling similar organic compounds convinced me there's never a shortcut to good storage.
If you scan the safety data sheet for this chemical, you’ll spot several warnings: flammability, potential harm from inhalation, and even risk of chemical burns if it splashes. Someone I knew got careless during a bench transfer once, forgot gloves, and ended up with a red, stinging palm. These stories don’t belong just in safety meetings—they’re reminders that each bottle demands respect and careful attention.
I don’t keep it near a window or anywhere sunlight gets in. Heat and light have a way of speeding up unwanted changes; breakdowns can release vapors you’d rather not deal with, and you risk the bottle building up pressure. If the bottle sits near heating vents or lamps, you could come back to a mess nobody wants to clean.
I use an airtight container, preferably the original glass or high-density plastic bottle it came in, with a screw cap that fits well. Rubber stoppers and loose lids let the fumes out. Every time I finish my work, I seal it and label the date, so there’s never confusion about what’s inside or how long it’s been stored.
On the shelf in my chemical storage cabinet, it rests with other organics, never near anything acidic or strongly oxidizing. I make that habit because mixing up those neighbors can ruin both bottles and pose real risk. Once, in a university storeroom, incompatible chemicals ended up on the same shelf. The result: a lunchtime evacuation and a week of cleanup. Lesson learned.
There’s always that temptation to cut corners—just shove the bottle anywhere, tell yourself you’ll come back and organize later. Skipping this step is how spilled chemicals and fires happen. I keep a tidy, cool, and lockable cabinet for all flammable liquids. This means out of reach for undergraduates and away from airflows that could spread vapors.
Every laboratory and stockroom deserves a list of up-to-date chemical inventories and safety rules posted clearly. If you share a workspace, everyone should know where Ethyl 3-Aminocrotonate sits, who checks the inventory, and where to turn if there’s a leak. Too often, people rely on memory or guesswork, which usually fails just when things matter most.
Anyone in a small-scale research setting can do a lot for safety without fancy equipment. Store Ethyl 3-Aminocrotonate in tightly sealed containers, keep it out of the sunlight and away from heat, avoid mixing with acids or oxidizers, and always label containers with clear information. Training new team members—never assuming they already know—is how you keep the story from going sideways.
This isn’t just about following rules—it’s about respecting the risks. In the end, safe storage keeps the science moving and everyone intact.
Ethyl 3-Aminocrotonate lands on the bench in plenty of organic labs, so most chemists recognize its sharp, almost fruit-chemical smell before they even look at the label. Working with it, I’ve picked up a few habits rooted in old lessons—never trust a chemical to “behave,” and never dive in without a plan. The risks aren’t mysterious: skin irritation, nasty headaches, and unpredictable reactivity when spilled or mixed the wrong way. Walking in blind usually means walking out with regret.
Nobody wants to spend their afternoon scrubbing weird red streaks from their hands or the bench. I grab splash goggles, gloves—nitrile, not latex, since I learned the hard way about leaky seams—and a snug lab coat. No open shoes. Spills or splashes sneak up without warning, especially when pouring from plastic jugs. Tighten the lid after every use, not after lunch.
A whiff of aminocrotonate stirs up more than just your nostrils. It tickles the back of your throat, and too much leaves a rough cough in your chest. Fume hoods turn that scene into a non-issue, so I always move operations under the hood. After the job, closed bottles live in chemical storage, away from sunlight and heat. No exceptions. The chemical doesn’t forgive heat, and glass jars don’t bounce well on tile floors.
I used to get lazy about keeping a tidy space. Not worth it. Loose papers, leftover solvents, unlabeled vials—those become traffic jams once the gloves get slippery. Before screwing open any new reagent, I double-check the workspace and clear the exits. Spills stay small when they hit bare bench, not a puddle of old acetone or tower of glassware.
People sometimes treat aminocrotonate like it couldn’t possibly do much harm beyond a stinky shirt. A tiny splash on your arm tells a different story. I learned to keep it in designated containers, double-bagging when carrying it further than an arm’s reach. If it drips, treat it as trouble. Grab absorbent pads, wear gloves, then scrub the area with detergent once everything gets mopped up. Never skip reporting accidents—the details protect the next person.
At my last lab, folks tossed all organic waste together until management cracked down. Separate containers for halogenated, flammable, and toxic waste keep disposal teams from surprise headaches. Ethyl 3-Aminocrotonate drops into its own bin, not mixed with acids or bases. Waste runs get labeled and logged at the end of every session—no mystery mixtures by the sink.
I don’t trust old notes or rumors. The safety data sheet (SDS) always lives within arm’s reach, printed or digital. Even seasoned chemists forget details or miss new updates. Calling on up-to-date resources means safer choices every day.
No amount of experience shields anyone from routine mistakes. Teamwork, solid habits, and clear communication make the difference when working with chemicals like Ethyl 3-Aminocrotonate. Respect for the material—shared through stories, not just warning labels—shapes a safer lab every time.
| Names | |
| Preferred IUPAC name | Ethyl 3-aminobut-2-enoate |
| Other names |
Ethyl 3-aminobut-2-enoate Ethyl 3-amino-2-butenoate 3-Aminocrotonic acid ethyl ester Crotonic acid, 3-amino-, ethyl ester Ethyl (E)-3-aminocrotonate |
| Pronunciation | /ˈiːθɪl θriː əˈmiːnəˌkroʊtəneɪt/ |
| Identifiers | |
| CAS Number | [10544-63-5] |
| 3D model (JSmol) | `Ethyl 3-Aminocrotonate` JSmol 3D model string: ``` CCOC(=O)C=C(N)C ``` This is the **SMILES** string, commonly used as the data-string input for JSmol 3D viewers. |
| Beilstein Reference | 146216 |
| ChEBI | CHEBI:131680 |
| ChEMBL | CHEMBL267052 |
| ChemSpider | 12196 |
| DrugBank | DB08345 |
| ECHA InfoCard | 03bbf366-9fbe-4eef-98d4-0c25d0eab491 |
| EC Number | 226-311-5 |
| Gmelin Reference | 100212 |
| KEGG | C00773 |
| MeSH | D017317 |
| PubChem CID | 8739 |
| RTECS number | KY9650000 |
| UNII | UK80V3CJ52 |
| UN number | UN2529 |
| CompTox Dashboard (EPA) | DV978QZY6R |
| Properties | |
| Chemical formula | C6H11NO2 |
| Molar mass | 129.16 g/mol |
| Appearance | Light yellow to yellow liquid |
| Odor | Amine-like |
| Density | 1.06 g/cm3 |
| Solubility in water | Slightly soluble |
| log P | 0.01 |
| Vapor pressure | 0.3 mmHg (25°C) |
| Acidity (pKa) | pKa ≈ 10.5 |
| Basicity (pKb) | 6.23 |
| Magnetic susceptibility (χ) | -5.38×10^-6 cm³/mol |
| Refractive index (nD) | 1.446 |
| Viscosity | 85 cP (20 °C) |
| Dipole moment | 3.24 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 399.6 J·mol⁻¹·K⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | -270.2 kJ/mol |
| Pharmacology | |
| ATC code | N06AX03 |
| Hazards | |
| Main hazards | Harmful if swallowed. Causes serious eye irritation. Causes skin irritation. |
| GHS labelling | GHS02, GHS07 |
| Pictograms | GHS07 |
| Signal word | Warning |
| Hazard statements | H302: Harmful if swallowed. |
| Precautionary statements | P261, P264, P271, P273, P280, P302+P352, P305+P351+P338, P312, P337+P313, P362+P364 |
| Flash point | 76°C |
| Autoignition temperature | 340°C |
| Lethal dose or concentration | LD50 (oral, rat): 1600 mg/kg |
| LD50 (median dose) | LD50 (median dose): Oral-rat LD50: 398 mg/kg |
| PEL (Permissible) | Not established |
| REL (Recommended) | 0.1 ppm |
| Related compounds | |
| Related compounds |
Ethyl acetoacetate Crotonic acid Ethyl crotonate 3-Aminocrotonic acid Methyl 3-aminocrotonate |
