71840-43-2

Upstream product

• 186581-53-3 diazomethane 
• 121003-03-0 2-(2,4-dioxo-3-phenylacatamidoazetidin-1-yl)-3-methylbut-2-enoic acid 
• 121054-12-4 methyl 3-methyl-2-<(3R,4R)-2-oxo-3-phenylacetamido-4-pyruvoyloxyazetidin-1-yl>but-2-enoate 
• 121054-11-3 methyl 3-methyl-2-<(3S,4S)-2-oxo-3-phenylacetamido-4-pyruvoyloxyazetidin-1-yl>but-2-enoate 
• 121003-01-8 methoxymethyl 3-methyl-2-<(3R,4R)-2-oxo-3-phenylacetamido-4-pyruvoyloxyazetidin-1-yl>but-2-enoate 
• 121003-00-7 methoxymethyl 2-<(1R,5S)-3-benzyl-7-oxo-4-oxa-2,6-diazabicyclo<3.2.0>hept-2-en-6-yl>-3-methylbut-2-enoate 
• 121003-02-9 methoxymethyl 2-(2,4-dioxo-3-phenylacatamidoazetidin-1-yl)-3-methylbut-2-enoate 
• 20664-07-7 methyl benzylpenicillinate 1,1-dioxide 
• 62607-61-8 (2R,3S)-1-(1-methoxycarbonyl-2-methylprop-1-enyl)-3-phenylacetamido-4oxoazetidine-2-sulphinic acid 
• 87305-52-0 methyl 2-<(1R,5S)-3-benzyl-7-oxo-4-oxa-2,6-diazabicyclo<3.2.0>hept-2-en-6-yl>-3-methylbut-2-enoate 
• 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 
• 18598-31-7 benzylpenicillin 1,1-dioxide 
• 56526-47-7 (S)-2-((1S)-3-benzyl-7-oxo-(1rH,5cH)-4-oxa-2,6-diaza-bicyclo[3.2.0]hept-2-en-6-yl)-3-(Ξ)-methanesulfinyl-3-methyl-butyric acid methyl ester 
• 56526-46-6 methyl (2S)-2-<(1S,5R)-3-benzyl-7-oxo-4-oxa-2,6-diazabicyclo<3.2.0>hept-2-en-6-yl>-3-methyl-3-methylthiobutanoate 

Relevant academic research and scientific papers

STUDIES RELATED TO PENICILLINS. PART 26. CONVERSION OF POTASSIUM BENZYLPENICLLINATE INTO 1-SUBSTITUTED DERIVATIVES OF 3-PHENYL-ACETAMIDOAZETIDINE-2,4-DIONE

A new method for the synthesis of azetidine-2,4-diones, involving a Norrish Type II photoreaction of 4-pyruvoylazetidin-2-ones, has been devised.The process features in strategies in which potassium benzylpenicillinate (17a) is converted into 1-substitute