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CAS 141-97-9
ethyl 3-oxobutanoate1-Ethoxybutane-1,3-dioneAcetoacetic ethyl esterEthyl 3-oxobutanoate
Codes: PALB-027, (XXXVI)1024528-1-d, Ceftazidime-001, Lercanidipine Hydrochloride-045, SITAF-014, SUNT-012, Cilastatin Sodium-023, TERI-001, Imidol-001, BASI-001
Application context (from source-drug indications)
Breast cancerPalbociclibNon-small cell lung cancerPralsetinibThyroid cancerPralsetinibMedullary thyroid cancerPralsetinibCystitisAvibactam Sodium/CeftazidimeCholecystitisAvibactam Sodium/CeftazidimePeritonitisAvibactam Sodium/CeftazidimeIntra-abdominal infectionAvibactam Sodium/CeftazidimeLiver abscessAvibactam Sodium/CeftazidimeSepsisAvibactam Sodium/CeftazidimeEssential hypertensionValsartan/Lercanidipine HydrochlorideBacterial infectionCeftazidime/Tazobactam SodiumRespiratory tract infectionCeftazidime/Tazobactam SodiumUrinary tract infectionCeftazidime/Tazobactam SodiumCystitisSitafloxacin HydrateSinusitisSitafloxacin HydrateTonsillitisSitafloxacin HydratePneumoniaSitafloxacin HydrateCervicitisSitafloxacin HydratePericoronitisSitafloxacin HydratePancreatic neuroendocrine tumourSunitinib MalateRenal cell carcinomaSunitinib MalateGastrointestinal stromal tumourSunitinib MalateOsteosarcomaSunitinib MalateSarcomaSunitinib MalateLymphomaSunitinib MalateBacterial infectionCeftazidimeGram-positive bacterial infectionCeftazidimeGram-negative bacterial infectionCeftazidimeGynaecological disorderCeftazidimeIntra-abdominal infectionCeftazidimeOsteoarthritisCeftazidimeHypertensionLercanidipine HydrochlorideInfectious diseaseCilastatin SodiumSystemic lupus erythematosusTeriflunomide SodiumChronic hepatitis BImidol Hydrochloride
Source drugs (routes using this intermediate)
| Drug | Tier | Expiry |
|---|---|---|
| Palbociclib | Tier A — Act now | 2027 |
| Pralsetinib | Tier C — Watch / trade | 2031 |
| Avibactam Sodium/Ceftazidime | Tier C — Watch / trade | - |
| Valsartan/Lercanidipine Hydrochloride | Tier C — Watch / trade | - |
| Ceftazidime/Tazobactam Sodium | Tier C — Watch / trade | - |
| Sitafloxacin Hydrate | Tier C — Watch / trade | - |
| Sunitinib Malate | Tier B — Position early | - |
| Ceftazidime | Tier C — Watch / trade | - |
| Lercanidipine Hydrochloride | Tier C — Watch / trade | - |
| Cilastatin Sodium | Tier C — Watch / trade | - |
| Teriflunomide Sodium | Tier C — Watch / trade | - |
| Imidol Hydrochloride | Tier C — Watch / trade | - |
| Basimglurant Sulfate | Tier C — Watch / trade | - |
Position in synthesis routes (up/downstream chain)
Ordered by route registration; left → right is the synthesis direction. The highlighted node is the current CAS; others link to their own profiles.
cyclopentanamine→tert-butyl 4-(6-aminopyridin-3-yl)piperazine-1-carboxylate→ethyl 3-oxobutanoate→N-cyclopentyl-3-oxo-N-(3-oxobutanoyl)butanamide→3-acetyl-1-cyclopentyl-6-hydroxy-4-methylpyridin-2(1H)-one→5-acetyl-2-chloro-1-cyclopentyl-4-methyl-6-oxo-1,6-dihydropyridine-3-carbaldehyde→tert-butyl 4-(6-guanidinopyridin-3-yl)piperazine-1-carboxylate sulfate→methyl carbamimidothioate sulfate
1,4 Cyclohexanedione ethylene ketal→Methyl 1-methoxy-4-(4-methyl-6-oxo-1,6-dihydropyrimidin-2-yl)cyclohexane-1-carboxylate→1,4-Dioxaspiro[4.5]decane-8-carbonitrile→N-Hydroxy-1,4-dioxaspiro[4.5]decane-8-carboximidamide→1,4-Dioxaspiro[4.5]decane-8-carboximidamide→1-Ethoxybutane-1,3-dione→2-(1,4-Dioxaspiro[4.5]decan-8-yl)-6-methylpyrimidin-4-ol→4-(4-Hydroxy-6-methylpyrimidin-2-yl)cyclohexan-1-one
ethyl 3-oxobutanoate→Ethyl nitrite→Non-denatured ethanol→ethyl (E)-2-(hydroxyimino)-3-oxobutanoate→thiourea→ethyl (Z)-2-(2-aminothiazol-4-yl)-2-(hydroxyimino)acetate→Ethyl (2Z)-(hydroxyimino)[2-[(triphenylmethyl)amino]-1,3-thiazol-4-yl]acetate→tert-Butyl 2-bromo-2-methylpropionate→tert-Butyl 2-[[(Z)-(2-ethoxy-2-oxo-1-[2-[(triphenylmethyl)amino]-1,3-thiazol-4-yl]ethylidene)amino]oxy]-2-methylpropanoate→(2Z)-[[(1-tert-Butoxy-2-methyl-1-oxopropan-2-yl)oxy]imino][2-[(triphenylmethyl)amino]-1,3-thiazol-4-yl]acetic acid→(6R,7R)-3-(Acetoxymethyl)-7-amino-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid→(6R,7R)-3-[(Acetyloxy)methyl]-7-[[(2Z)-2-[[(1-tert-butoxy-2-methyl-1-oxopropan-2-yl)oxy]imino]-2-[2-[(triphenylmethyl)amino]-1,3-thiazol-4-yl]acetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid→(6R,7R)-3-[(Acetyloxy)methyl]-7-[[(2Z)-2-(2-amino-1,3-thiazol-4-yl)-2-[[(2-carboxypropan-2-yl)oxy]imino]acetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid→pyridine
ethyl 3-oxobutanoate→Ethyl nitrite→Non-denatured ethanol→ethyl (E)-2-(hydroxyimino)-3-oxobutanoate→thiourea→ethyl (Z)-2-(2-aminothiazol-4-yl)-2-(hydroxyimino)acetate→Ethyl (2Z)-(hydroxyimino)[2-[(triphenylmethyl)amino]-1,3-thiazol-4-yl]acetate→tert-Butyl 2-bromo-2-methylpropionate→tert-Butyl 2-[[(Z)-(2-ethoxy-2-oxo-1-[2-[(triphenylmethyl)amino]-1,3-thiazol-4-yl]ethylidene)amino]oxy]-2-methylpropanoate→(2Z)-[[(1-tert-Butoxy-2-methyl-1-oxopropan-2-yl)oxy]imino][2-[(triphenylmethyl)amino]-1,3-thiazol-4-yl]acetic acid→(6R,7R)-3-(Acetoxymethyl)-7-amino-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid→(6R,7R)-3-[(Acetyloxy)methyl]-7-[[(2Z)-2-[[(1-tert-butoxy-2-methyl-1-oxopropan-2-yl)oxy]imino]-2-[2-[(triphenylmethyl)amino]-1,3-thiazol-4-yl]acetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid→(6R,7R)-3-[(Acetyloxy)methyl]-7-[[(2Z)-2-(2-amino-1,3-thiazol-4-yl)-2-[[(2-carboxypropan-2-yl)oxy]imino]acetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid→pyridine
Intermediates available on this site
Side-by-side comparison of all listed offers on this CAS; price bands are list-price ranges, final price subject to RFQ confirmation.
| Supplier | Product | Price band | MOQ | Lead time | Qualifications | Action |
|---|---|---|---|---|---|---|
| Qualified Partner — East China API Works | 5-broMo-2-chloro-N-cyclopentylpyriMidin-4-aMine Pharmaceutical Intermediates | On request | On request | On request | — | |
| Unibest Nantong cGMP Site | 2-chloro-8-cyclopentyl-5-Methylpyrido[2,3-d]pyriMidin-7(8H)-one Pharmaceutical Intermediates | On request | On request | On request | — | |
| Unibest Taizhou GMP-like Site | 6-broMo-2-chloro-8-cyclopentyl-5-Methylpyrido[2,3-d]pyriMidin-7(8H)-one Pharmaceutical Intermediates | On request | On request | On request | — | |
| Qualified Partner — East China API Works | tert-Butyl 4-(6-aminopyridin-3-yl)piperazine-1-carboxylate Pharmaceutical Intermediates | On request | On request | On request | — | |
| Unibest Nantong cGMP Site | Tert-butyl 4-(6-nitropyridin-3-yl)piperazine-1-carboxylate Pharmaceutical Intermediates | On request | On request | On request | — | |
| Unibest Taizhou GMP-like Site | tert-Butyl 4-(6-((6-(1-butoxyvinyl)-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydropyrido[2,3-d]pyrimidin-2-yl)amino)pyridin-3-yl)piperazine-1-carboxylate Pharmaceutical Intermediates | On request | On request | On request | — | |
| Qualified Partner — East China API Works | PD 0332991 HCl Pharmaceutical Intermediates | On request | On request | On request | — | |
| Unibest Nantong cGMP Site | Carbamic acid, (7S)-5-azaspiro[2.4]hept-7-yl-, 1,1-dimethylethyl ester (9CI) Pharmaceutical Intermediates | On request | On request | On request | — | |
| Qualified Partner — East China API Works | 5-Fluoro-2-oxindole Pharmaceutical Intermediates | On request | On request | On request | — | |
| Unibest Nantong cGMP Site | 5-Formyl-2,4-dimethyl-1H-pyrrole-3-carboxylic acid Pharmaceutical Intermediates | On request | On request | On request | — |
This is a CAS-level registry record: registrations across routes are merged. Supplier offers and buyer demands will be matched on this CAS as the primary key.