67977-88-2

Upstream product

• 67977-90-6 (R)-3-Nitrooxymethyl-2-((1R,5S)-7-oxo-3-phenyl-4-oxa-2,6-diaza-bicyclo[3.2.0]hept-2-en-6-yl)-but-3-enoic acid benzhydryl ester 
• 67977-61-1 epi-Secopenicillin 
• 67977-79-1 (R)-3-chloromethyl-2-((1R)-7-oxo-3-phenyl-(1rH,5cH)-4-oxa-2,6-diaza-bicyclo[3.2.0]hept-2-en-6-yl)-but-3-enoic acid benzhydryl ester 
• 67977-89-3 (S)-3-Iodomethyl-2-((1S,5R)-7-oxo-3-phenyl-4-oxa-2,6-diaza-bicyclo[3.2.0]hept-2-en-6-yl)-but-3-enoic acid benzhydryl ester 
• 69780-18-3 6-epipenicillin sulfoxide 
• 74242-86-7 Diphenylmethyl-2-(3R,4R-3-benzamido-4-chlor-2-oxo-azetidin-1-yl)-3-chlormethyl-3-butenoat 
• 67977-85-9 (R)-2-((1R,5S)-7-Oxo-3-phenyl-4-oxa-2,6-diaza-bicyclo[3.2.0]hept-2-en-6-yl)-3-phenylsulfanylmethyl-but-3-enoic acid benzhydryl ester 

Downstream Products

• 67977-91-7 (2R,6R,7R)-7-Benzoylamino-3-methylene-8-oxo-5-oxa-1-aza-bicyclo[4.2.0]octane-2-carboxylic acid benzhydryl ester 
• 91178-05-1 (R)-3,4-Dihydroxy-3-hydroxymethyl-2-((1R,5S)-7-oxo-3-phenyl-4-oxa-2,6-diaza-bicyclo[3.2.0]hept-2-en-6-yl)-butyric acid benzhydryl ester 
• 73786-30-8 (R)-3-Acetoxymethyl-2-((1R,5S)-7-oxo-3-phenyl-4-oxa-2,6-diaza-bicyclo[3.2.0]hept-2-en-6-yl)-but-3-enoic acid benzhydryl ester 
• 1186615-53-1 (2S,6R,7R)-7-Benzoylamino-3-chloro-3-chloromethyl-8-oxo-5-oxa-1-aza-bicyclo[4.2.0]octane-2-carboxylic acid benzhydryl ester 
• 68314-04-5 (6R,7R)-7-Benzoylamino-3-chloromethyl-8-oxo-5-oxa-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid benzhydryl ester 

Relevant academic research and scientific papers

Method for synthesizing oxacephem intermediate

The invention discloses a method for synthesizing an oxacephem intermediate (formula I). The method comprises purifying an isopropenylepioxazoline chlorination product through a lower-level alcohol solvent so that the influence caused by impurities on the

STEREOCONTROLLED, STRAIGHTFORWARD SYNTHESIS OF 3-SUBSTITUTED METHYL 7α-METHOXY-1-OXACEPHEMS

Stereocontrolled and industrially feasible synthesis of a new antibiotic 1a and related derivates, which is characterized by using all the carbon atoms of the penicillin skeleton, is described.