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

Also known as: 1-Azetidinecarboxylic acid, 3-(1-ethoxyethoxy)-2-oxo-4-phenyl-, 1,1-dimethylethyl ester, (3R,4S)-, (3R,4S)-1-tert-Butoxycarbonyl-3-(1-ethoxyethoxy)-4-phenyl-2-azetidinone, Docetaxel Side Chain 1, U624

tert-butyl (3R,4S)-3-(1-ethoxyethoxy)-2-oxo-4-phenylazetidine-1-carboxylate (CAS 152089-12-8) is a compound in the Ketones 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.: 152089-12-8
Jingsj CID: J-1378413-7
Molecular Formula: C₁₈H₂₅NO₅
Molecular Weight: 335.395 g/mol
Category: Ketones
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	459.6±45.0 °C at 760 mmHg
Density	1.2±0.1 g/cm3
Flash Point	231.8±28.7 °C
Exact Mass	335.173279
PSA	65.07000
LogP	2.30
Vapor Pressure	0.0±1.1 mmHg at 25°C
Refractive Index	1.532

Customs & Trade Information

HS Code	2933990090
Summary	2933990090. heterocyclic compounds with nitrogen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of tert-butyl (3R,4S)-3-(1-ethoxyethoxy)-2-oxo-4-phenylazetidine-1-carboxylate?

The CAS number of tert-butyl (3R,4S)-3-(1-ethoxyethoxy)-2-oxo-4-phenylazetidine-1-carboxylate is 152089-12-8.

What are the molecular formula and molecular weight of tert-butyl (3R,4S)-3-(1-ethoxyethoxy)-2-oxo-4-phenylazetidine-1-carboxylate?

tert-butyl (3R,4S)-3-(1-ethoxyethoxy)-2-oxo-4-phenylazetidine-1-carboxylate has molecular formula C18H25NO5 and molecular weight 335.395 g/mol.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "tert-butyl (3R,4S)-3-(1-ethoxyethoxy)-2-oxo-4-phenylazetidine-1-carboxylate (CAS 152089-12-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1378413-7 (accessed 2026-11-06).

Data for reference only; verify product details with suppliers before purchase.