33069-20-4

Upstream product

• 87-08-1 penicilin V 
• 10213-10-2 sodium tungstate (VI) dihydrate 

Downstream Products

• 40578-85-6 2-[2-benzothiazol-2-yldisulfanyl-4-oxo-3-(2-phenoxy-acetylamino)-azetidin-1-yl]-3-methyl-but-3-enoic acid 
• 40578-83-4 4-(5-methyl-1,3,4-thiadiazole-2-yl)-dithio-3-(2-phenoxyacetamido)-α-isopropenyl-2-oxoazetidine-1-acetic acid 

Relevant academic research and scientific papers

DIASTEREOSELECTIVE OXIDATION OF SULFIDES TO SULFOXIDES WITH POTASSIUM PEROXYMONOSULFATE

Potassium peroxymonosulfate oxidation of sulfides to sulfoxides occurs with high diastereoselectivity.

Halogenated penam derivatives and the preparation thereof

A penam derivative having the formula: STR1 wherein X represents a halogen atom, and wherein R1 represents an amino or acylamino, and R3 represents a radical selected from the group consisting of carboxy, ester, acid amide, acid anhydride, acid halide, and acid azide.

Process for the ring expansion of penicillins to cephalosporin compounds

A process for producing a 2-cephem or 3-cephem derivative compound of the formula: SPC1 Wherein R1 represents a substituted or unsubstituted amino radical and R4 represents hydrogen or a radical selected from the group consisting of carboxy, protected carboxy, ester, acid amide, acid anhydride, acid halide, acid azide and carboxy salt, and the dotted line indicates the alternate bond structure providing 3-cephem or 2-cephem, which comprises: Reacting a halogenated derivative selected from the group consisting of a halogenated penam derivative having the formula: SPC2 A halogenated cepham derivative of the formula: SPC3 Wherein X represents a halogen atom, R3 represents a radical selected from the group consisting of carboxy, protected carboxy, ester, acid amide, acid anhydride, acid halide, acid azide and carboxy salt, and R1 is as defined above, or mixtures thereof with a dehydrohalogenoic acid reagent.