27250-45-9

Upstream product

• 24647-47-0 2,2,2-Trichloroethyl (6R,7R)-3-methyl-<(phenoxyacetyl)amino>-8-oxo-5-thia-1-azabicyclo<4.2.0>oct-2-ene-2-carboxylate 

Downstream Products

• 49823-68-9 (6R)-3-methyl-4-methylene-5t,8-dioxo-7t-(2-phenoxy-acetylamino)-(6rH)-5λ⁴-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid 2,2,2-trichloro-ethyl ester 
• 33213-51-3 (6R)-3,4t-dimethyl-5ξ,8-dioxo-7t-(2-phenoxy-acetylamino)-(6rH)-5λ⁴-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid 2,2,2-trichloro-ethyl ester 
• 33277-63-3 (6R)-3,4c-dimethyl-5ξ,8-dioxo-7t-(2-phenoxy-acetylamino)-(6rH)-5λ⁴-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid 2,2,2-trichloro-ethyl ester 
• 33396-45-1 (6R)-3,4c-dimethyl-8-oxo-7t-(2-phenoxy-acetylamino)-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid 2,2,2-trichloro-ethyl ester 
• 33277-67-7 (6R)-3,4t-dimethyl-8-oxo-7t-(2-phenoxy-acetylamino)-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid 2,2,2-trichloro-ethyl ester 
• 33277-70-2 (6R)-3,4c-dimethyl-8-oxo-7t-(2-phenoxy-acetylamino)-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid 
• 31932-93-1 (6R)-3,4t-dimethyl-8-oxo-7t-(2-phenoxy-acetylamino)-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid 
• 33277-65-5 (6R)-4c-bromo-4t-bromomethyl-3-methyl-5ξ,8-dioxo-7t-(2-phenoxy-acetylamino)-(6rH)-5λ⁴-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid 2,2,2-trichloro-ethyl ester 
• 33277-66-6 (6R)-3-methyl-4-methylene-8-oxo-7t-(2-phenoxy-acetylamino)-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid 2,2,2-trichloro-ethyl ester 
• 33277-64-4 (6R)-3,4-dimethyl-8-oxo-7t-(2-phenoxy-acetylamino)-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-3-ene-2ξ-carboxylic acid 2,2,2-trichloro-ethyl ester 
• 31932-97-5 (6R)-3ξ-methyl-4-methylene-8-oxo-7t-(2-phenoxy-acetylamino)-(6rH)-5-thia-1-aza-bicyclo[4.2.0]octane-2ξ-carboxylic acid 
• 33277-69-9 (6R)-3,4-dimethyl-8-oxo-7t-(2-phenoxy-acetylamino)-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-3-ene-2ξ-carboxylic acid 
• 33213-50-2 2,2,2-trichloroethyl 7β-phenoxyacetamido-2-methylene-3-methyl-3-cephem-4-carboxylate 1S-(β)-oxide 

Relevant academic research and scientific papers

OXIDATION STUDIES ON BETA-LACTAM ANTIBIOTICS SYNTHESIS OF PHENAM AND CEPHEM SULFOXIDES AND SULFONES

Penicillin and cephalosporin sulfoxides are conveniently prepared by oxidation of the respective penicillin or cephalosporin in methylene chloride using hydrogen peroxide and acetic acid.Replacement of the acetic acid by formic acid produces the respectiv