67144-72-3

Upstream product

• 149-30-4 2-Mercaptobenzothiazole 
• 4052-54-4 Penicillin G 1-(s)-oxide 

Downstream Products

• 79386-26-8 methyl 2-<(3S)-4-(benzothiazol-2-ylthio)-2-oxo-3-phenylacetamidoazetidin-1-yl>-3-methylbut-2-enoate 
• 79434-35-8 methyl (2R)-2-<(1S,5R)-3-benzyl-7-oxo-4-oxa-2,6-diazabicyclo<3.2.0>hept-2-en-6-yl>-3-methylbut-3-enoate 
• 79386-29-1 1-dethia-1-oxa-5-epi-anhydropenicillin 
• 79386-28-0 (2R,5S,6S)-2-(1-methylethenyl)-6-phenylacetamido-4-oxa-1-azabicyclo<3.2.0>heptane-3,7-dione 
• 34104-19-3 methyl 2-<(1S,5R)-3-benzyl-7-oxo-4-oxa-2,6-diazabicyclo<3.2.0>hept-2-en-6-yl>-3-methylbut-2-enoate 
• 79386-27-9 (1S,5R)-3-phenylmethyl-6-<(1R)-1-carboxy-2-methylprop-2-enyl>-4-oxa-2,6-diazabicyclo<3.2.0>hept-2-en-7-one 

Relevant academic research and scientific papers

Studies Related to β-Lactam Antibiotics. Part 7. Facile Formation of Oxazolinoazetidinones from Benzothiazolyldithioazetidinones and Related Reactions

4β-(Benzothiazol-2-yldithio)azetidin-2-one (2a), derived from penicillin G sulphoxide ester (1a), is converted competitively into the oxazolinoazetidinone (3a) and 4α-(benzothiazol-2-ylthio)azetidinone (4a) upon treatment with triphenylphosphine at room t