123809-54-1

Upstream product

• 35249-73-1 benzyl chlorooxalate 
• 90628-93-6 {(S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-4-oxo-azetidin-2-yl}-thioacetic acid S-phenyl ester 
• 882-33-7 diphenyldisulfane 
• 105620-64-2 (3S,4S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-1-(4-methoxy-phenyl)-4-phenylsulfanylethynyl-azetidin-2-one 
• 109170-55-0 Benzoic acid 1-[(2S,3S)-2-ethynyl-1-(4-methoxy-phenyl)-4-oxo-azetidin-3-yl]-ethyl ester 
• 105620-63-1 (3S,4S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-4-ethynyl-1-(4-methoxy-phenyl)-azetidin-2-one 
• 109170-54-9 Acetic acid (R)-1-[(2S,3S)-2-ethynyl-1-(4-methoxy-phenyl)-4-oxo-azetidin-3-yl]-ethyl ester 
• 90629-36-0 3(S)-<1(R)-<(tert-butyldimethylsilyl)oxy>ethyl>-4(S)-<(phenylthio)ethynyl>azetidin-2-one 
• 105620-48-2 (3S,4S)-4-Ethynyl-3-((S)-1-hydroxy-ethyl)-1-(4-methoxy-phenyl)-azetidin-2-one 
• 105662-84-8 (3S,4S)-4-Ethynyl-3-((R)-1-hydroxy-ethyl)-1-(4-methoxy-phenyl)-azetidin-2-one 
• 105620-52-8 dl 3,4-trans-1-(p-methoxyphenyl)-3-acetyl-4-ethylyl-2-azetidinone 

Downstream Products

• 124752-39-2 (5R,6S)-6-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-7-oxo-3-phenylsulfanyl-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid benzyl ester 

Relevant academic research and scientific papers

ASYMMETRIC HYDROLYSIS OF dl 3-(1-BENZOYLOXYETHYL)-AZETIDINONE DERIVATIVE AND CHEMICAL CONVERSION TO CARBAPENEM

Asymmetric hydrolysis of dl R* benzoate (dl 3) was achieved effectively by Bacillus subtilis to give the optically-active R-hydroxyethyl azetidinone 8, and this product 8 was converted chemically into the known β-azetidinyl acetyl thioester der