76855-73-7

Upstream product

• 122-52-1 triethyl phosphite 
• 79647-34-0 {(2R,3S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-2-[2-(4-nitro-benzyloxycarbonylamino)-ethylsulfanylthiocarbonylsulfanyl]-4-oxo-azetidin-1-yl}-(triphenyl-λ⁵-phosphanylidene)-acetic acid 4-nitro-benzyl ester 
• 76855-71-5 {(2R,3S)-3-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-2-[2-(4-nitro-benzyloxycarbonylamino)-ethylsulfanylthiocarbonylsulfanyl]-4-oxo-azetidin-1-yl}-hydroxy-acetic acid 4-nitro-benzyl ester 
• 78902-89-3 C₁₁H₁₁N₂O₄S₃^(1-)*Na⁽¹⁺⁾ 
• 76899-07-5 (3R,4R)-3-[(R)-1-(tert-butyldimethylsilyloxy)ethyl]-4-acetoxyazetidin-2-one 
• 65750-59-6 2-(4-nitrobenzyloxycarbonylamino)ethanethiol 
• 76855-70-4 Trithiocarbonic acid (2R,3S)-3-[(R)-1-(tert-butyl-dimethyl-silanyloxy)-ethyl]-4-oxo-azetidin-2-yl ester 2-(4-nitro-benzyloxycarbonylamino)-ethyl ester 
• 81779-73-9 chloroxoacetic acid (4-nitrophenyl)methyl ester 
• 86634-57-3 C₃₇H₅₃N₄O₁₃PS₃Si 
• 76863-96-2 (5S,6S)-6-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-3-[2-(4-nitro-benzyloxycarbonylamino)-ethylsulfanyl]-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester 

Downstream Products

• 79634-15-4 (5R,6S)-6-((R)-1-Hydroxy-ethyl)-3-[2-(4-nitro-benzyloxycarbonylamino)-ethylsulfanyl]-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester 
• 76863-96-2 (5S,6S)-6-[(R)-1-(tert-Butyl-dimethyl-silanyloxy)-ethyl]-3-[2-(4-nitro-benzyloxycarbonylamino)-ethylsulfanyl]-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester 
• 81044-11-3 (5S,6S)-6-((R)-1-Hydroxy-ethyl)-3-[2-(4-nitro-benzyloxycarbonylamino)-ethylsulfanyl]-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 4-nitro-benzyl ester 
• 72888-55-2 (5R,6S)-3-(2-Amino-ethylsulfanyl)-6-((R)-1-hydroxy-ethyl)-7-oxo-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 

Relevant academic research and scientific papers

NEW SYNTHESIS OF PENEMS VIA A REDUCTIVE CYCLIZATION REACTION OF OXALIMIDES WITH TRIALKYL PHOSPHITE

Treatment of the oxalimide 5 with triethyl phosphite formed the penem 3 and the triethoxyphosphonium ylide 7, presumably via the common carbene intermediate 10.Prolonged heating of 7 afforded 3 and its C-5 epimer.Similar reaction of the oxalimide 13 with