83242-27-7

Upstream product

• 33405-92-4 2-benzothiazolylsulfenyl chloride 
• 83290-69-1 (R)-2-((1R,5R)-3-Benzyl-7-oxo-4-thia-2,6-diaza-bicyclo[3.2.0]hept-2-en-6-yl)-3-chloromethyl-but-3-enoic acid benzyl ester 
• 80405-20-5 (R)-2-[(1R,5R)-3-(Dichloro-phenyl-methyl)-7-oxo-4-thia-2,6-diaza-bicyclo[3.2.0]hept-2-en-6-yl]-3-methyl-but-3-enoic acid benzyl ester 
• 86832-60-2 (R)-3-Chloromethyl-2-[(1R,5R)-3-(dichloro-phenyl-methyl)-7-oxo-4-thia-2,6-diaza-bicyclo[3.2.0]hept-2-en-6-yl]-but-3-enoic acid benzyl ester 
• 86832-59-9 (R)-2-((1R,5R)-3-Benzyl-7-oxo-4-thia-2,6-diaza-bicyclo[3.2.0]hept-2-en-6-yl)-3-methyl-but-3-enoic acid benzyl ester 

Downstream Products

• 83242-34-6 (6R,7R)-3-(Benzothiazol-2-ylsulfanylmethyl)-8-oxo-7-phenylacetylamino-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid benzyl ester 

Relevant academic research and scientific papers

PENICILLIN-CEPHALOSPORIN CONVERSION IV. DIRECT SYNTHESIS OF 3'-THIOSUBSTITUTED CEPHALOSPORINS FROM THIAZOLE-AZETIDINONES

Direct transformation of thiazoline-azetidinones 2, derived from penicillin G and V, into 3'-thio-substituted cephalosporins 4 has been performed by ring opening of the thiazoline moiety with sulfenyl chlorides followed by ring closure with NH3 in dimethy