115355-69-6

Upstream product

• 81779-73-9 chloroxoacetic acid (4-nitrophenyl)methyl ester 
• 88035-31-8 (3S,4R)-3-((R)-1-(t-butyldimethylsilyloxy)ethyl)-4-triphenylmethylthio-2-azetidinone 
• 76899-07-5 (3R,4R)-3-[(R)-1-(tert-butyldimethylsilyloxy)ethyl]-4-acetoxyazetidin-2-one 

Downstream Products

• 96855-24-2 (5R,6S)-6-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-3-ethylsulfanyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester 
• 115355-63-0 (5S,6S)-6-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-3-(4-carbamoyl-phenoxy)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester 
• 115355-64-1 (5R,6S)-6-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-3-(4-carbamoyl-phenoxy)-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

Alkylphosphonous acid diesters, novel reagents for the oxalimide cyclization to penems

Alkylphosphonous acid diesters MeP(OR)2 3a-b were shown to be highly effective and mild reducing reagents in the oxalimide cyclization of azetidinone-1-oxalyl-4-di or tri-thiocarbonates or 4-thioesters 1a-t forming penems 2a-t at lower temperat