33465-54-2

Upstream product

• 33465-39-3 2,2,2-trichloroethyl 7β-phenylacetamido-3-methyl-3-cephem-4-carboxylate 1S-(β)-oxide 
• 28180-80-5 (6R,7R)-2,2,2-trichloroethyl 3-methyl-7-phenylacetamidoceph-3-em-4-carboxylate 
• 85954-90-1 2,2,2-trichloroethyl(1R,2R,6R,7R)-2-bromo-3-methyl-7-phenylacetamidoceph-3-em-4-carboxylate 1-oxide 

Relevant academic research and scientific papers

Photoinitiated bromination of 3-methylceph-3-em 1S-oxide esters. A convenient synthesis of 3-substituted cephalosporins from penicillins

Photoinitiated bromination of 3-methyl-ceph-3-em 1S-oxide esters 2, readily obtained from penicillins, gave the corresponding 3-bromomethyl derivatives 5. The 3-bromomethyl 1S-oxides 5b and 5c were converted into the salts 12 and 13 of the 3-methylthiomet