98744-53-7

Upstream product

• 19293-62-0 p,p'-dimethoxybenzhydrylamine 
• 111969-64-3 d-menthyl glyoxalate monohydrate 

Downstream Products

• 137765-45-8 (3S,4S)-1-(di-p-anisylmethyl)-3-ethenyl-4-(d-menthyloxycarbonyl)-2-azetidinone 
• 137765-46-9 (2R,3R)-1-[Bis-(4-methoxy-phenyl)-methyl]-4-oxo-3-vinyl-azetidine-2-carboxylic acid (1S,2R,5S)-2-isopropyl-5-methyl-cyclohexyl ester 
• 137664-91-6 (3R,4S)-4-methoxycarbonyl-1-(di-p-anisylmethyl)-3-ethenyl-2-azetidinone 
• 137683-88-6 (3R,4R)-4-acetoxy-1-(di-p-anisylmethyl)-3-<(R)-1-(tert-butyldimethylsilyloxy)ethyl>-2-azetidinone 
• 91603-19-9 (3R,4R)-4-acetoxy-1-(di-p-anisylmethyl)-3-<(R)-1-p-nitrobenzyloxycarbonyloxyethyl>-2-azetidinone 
• 86258-96-0 (3R,4S)-4-carboxy-1-(di-p-anisylmethyl)-3-ethenyl-2-azetidinone 
• 137765-47-0 (3R,4R)-4-acetoxy-1-(di-p-anisylmethyl)-3-ethenyl-2-azetidinone 
• 86258-97-1 (3S,4S)-4-carboxy-1-(di-p-anisylmethyl)-3-<(R)-1-hydroxyethyl>-2-azetidinone 
• 1233825-17-6 (3R,4R)-4-acetoxy-1-(di-p-anisylmethyl)-3-<(R)-1-hydroxyethyl>-2-azetidinone 
• 144539-96-8 (2S,3S)-1-[Bis-(4-methoxy-phenyl)-methyl]-3-ethyl-4-oxo-azetidine-2-carboxylic acid (1R,2S,5R)-2-isopropyl-5-methyl-cyclohexyl ester 
• 144452-51-7 (2R,3R)-1-[Bis-(4-methoxy-phenyl)-methyl]-3-ethyl-4-oxo-azetidine-2-carboxylic acid (1R,2S,5R)-2-isopropyl-5-methyl-cyclohexyl ester 

Relevant academic research and scientific papers

Synthetic studies of carbapenem and penem antibiotics. I. Facile synthesis of a key intermediate: 4-Acetoxy-3-(1-hydroxyethyl)-2-azetidinone

A highly efficient synthesis of (3R,4R)-4-acetoxy-3-[(R)-1-hydroxyethyl]-2-azetidinone, which is a key intermediate for the synthesis of carbapenem and penem antibiotics, was accomplished. It was found that oxymercuration-reduction of easily obtainable 4-alkyloxycarbonyl-1-(di-p-anisylmethyl)-3-ethenyl-2-azetidinone could be employed as a key stereoselective reaction. The chiral starting material was obtained by optical resolution or asymmetric (2 + 2) cycloaddition. The desired product was afforded in four steps, that is, oxymercuration-reduction, oxidative decarboxylation, protection of the hydroxy group and removal of the N-protecting group.