Skip to main content

(5R,6S)-6-[(1R)-1-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]ethyl]-7-oxo-3-[(2R)-tetrahydro-2-furanyl]-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid 2-propenyl ester

Also known as: (5R,6S)-Allyl 6-((R)-1-((tert-butyldimethylsilyl)oxy)ethyl)-7-oxo-3-((R)-tetrahydrofuran-2-yl)-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate, Allyl (5R,6S)-6-[(1R)-1-{[tert-butyl(dimethyl)silyl]oxy}ethyl]-7-oxo-3-[(2R)-tetrahydrofuran-2-yl]-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate, Faropenem Related Compound 3, All(1'R,2"R,5R,6S)-6(1'-tert-butyl dimethylsilyloxyethy)-2-(2"-tetrahydrofuranyl)penem-3-carboxylate, prop-2-en-1-yl (5R,6S)-6-[(1R)-1-{[tert-butyl(dimethyl)silyl]oxy}ethyl]-7-oxo-3-[(2R)-tetrahydrofuran-2-yl]-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate

(5R,6S)-6-[(1R)-1-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]ethyl]-7-oxo-3-[(2R)-tetrahydro-2-furanyl]-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid 2-propenyl ester (CAS 120705-67-1) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C21H33NO5SSi and a molecular weight of 439.641 g/mol. Key properties include a boiling point of 536.3±50.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 278.1±30.1 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
120705-67-1
Jingsj CID
J-1070879-9
Molecular Formula
C21H33NO5SSi
Molecular Weight
439.641 g/mol
Category
Pharma Intermediates
Last updated
8/21/2026

No offers for this compound yet.

Request a quote

Physicochemical Properties

Boiling Point536.3±50.0 °C at 760 mmHg
Density1.2±0.1 g/cm3
Flash Point278.1±30.1 °C
Exact Mass439.184875
PSA90.37000
LogP3.67
Vapor Pressure0.0±1.4 mmHg at 25°C
Refractive Index1.542

Frequently Asked Questions

What is the CAS number of (5R,6S)-6-[(1R)-1-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]ethyl]-7-oxo-3-[(2R)-tetrahydro-2-furanyl]-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid 2-propenyl ester?

The CAS number of (5R,6S)-6-[(1R)-1-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]ethyl]-7-oxo-3-[(2R)-tetrahydro-2-furanyl]-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid 2-propenyl ester is 120705-67-1.

What are the molecular formula and molecular weight of (5R,6S)-6-[(1R)-1-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]ethyl]-7-oxo-3-[(2R)-tetrahydro-2-furanyl]-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid 2-propenyl ester?

(5R,6S)-6-[(1R)-1-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]ethyl]-7-oxo-3-[(2R)-tetrahydro-2-furanyl]-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid 2-propenyl ester has molecular formula C21H33NO5SSi and molecular weight 439.641 g/mol.

What are the upstream and downstream products of (5R,6S)-6-[(1R)-1-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]ethyl]-7-oxo-3-[(2R)-tetrahydro-2-furanyl]-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid 2-propenyl ester?

For (5R,6S)-6-[(1R)-1-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]ethyl]-7-oxo-3-[(2R)-tetrahydro-2-furanyl]-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid 2-propenyl ester, Upstream Products: allyl chlorooxoacetate; Downstream Products: Faropenem sodium.

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

Last updated:

How to cite: Jingsj. "(5R,6S)-6-[(1R)-1-[[(1,1-Dimethylethyl)dimethylsilyl]oxy]ethyl]-7-oxo-3-[(2R)-tetrahydro-2-furanyl]-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid 2-propenyl ester (CAS 120705-67-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1070879-9 (accessed 2026-11-09).

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