83860-44-0

Upstream product

• 75-15-0 carbon disulfide 
• 75-44-5 phosgene 
• 82864-29-7 (3S,4R)-3-<(R)-1-tert-Butyldimethylsilyloxyethyl>-4-methylthio-2-oxoazetidine 

Downstream Products

• 83807-48-1 {(2R,3S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-2-chloro-4-oxo-azetidin-1-yl}-(4-oxo-[1,3]dithietan-2-ylidene)-acetic acid 4-nitro-benzyl ester 
• 81864-87-1 (5R,6S)-6-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-3-cyanomethylsulfanyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester 
• 83807-51-6 (5S,6S)-6-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-3-cyanomethylsulfanyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester 
• 80926-64-3 (5S,6S)-6-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-7-oxo-3-thioxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid 4-nitro-benzyl ester 
• 81878-57-1 (5R,6S)-3-Cyanomethylsulfanyl-6-((R)-1-hydroxy-ethyl)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester 

Relevant academic research and scientific papers

2-Thioxopenams, Useful Intermediates for Penem Synthesis

The new penam derivatives, 2-thioxopenams, are prepared by a novel synthetic method and treated with alkylating agents to give penem derivatives.