tert-butyl (3R,4S)-3-(1-ethoxyethoxy)-2-oxo-4-phenylazetidine-1-carboxylate

Also known as: (3R,4S)-tert-Butyl 3-(1-ethoxyethoxy)-2-oxo-4-phenylazetidine-1-carboxylate, 1-Azetidinecarboxylic acid, 3-(1-ethoxyethoxy)-2-oxo-4-phenyl-, 1,1-dimethylethyl ester, (3R,4S)-, 2-Methyl-2-propanyl (3R,4S)-3-(1-ethoxyethoxy)-2-oxo-4-phenyl-1-azetidinecarboxylate, 3-(1-Ethoxyethoxy)-2-oxo-4-phenyl-1-azetidinecarboxylic acid 1,1-dimethylethyl ester, 3-(1-ethoxyethoxy)-2-oxo-4-phenyl-1-azetidinecarboxylic acid tert-butyl ester, Docetaxel Impurity 48, SIDE CHAINS OF DOCETAXEL--1, (3R,4S)-1-t-butoxycarbonyl-3-(2-ethoxyethoxyl)-4-phenyl-2-azetidinone, (3R,4S)-1-T-BUTOXYCARBONYL-3-(2-ETHOXYETHOXYL)-4-PHENYL-2-AZETIDINONE, (3R,4S)-1-AZETIDINECARBOXYLIC ACID-3-(2-ETHOXYETHOXY)-4-PHENYL-2-AZETIDINONE

tert-butyl (3R,4S)-3-(1-ethoxyethoxy)-2-oxo-4-phenylazetidine-1-carboxylate (CAS 201856-57-7) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C18H25NO5 and a molecular weight of 335.395 g/mol. Key properties include a boiling point of 459.6±45.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 231.8±28.7 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

201856-57-7

Jingsj CID

J-1567135-9

Molecular Formula

C₁₈H₂₅NO₅

Molecular Weight

335.395 g/mol

Category

Organic Acids

Last updated

8/21/2026