94398-76-2

Upstream product

• 66437-20-5 diphenylmethyl 4-bromo-acetoacetate 
• 141-53-7 sodium formate 

Downstream Products

• 90712-36-0 3-[(2R,3R)-3-Benzoylamino-1-(tert-butyl-dimethyl-silanyl)-4-oxo-azetidin-2-yloxymethyl]-2-[(Z)-hydroxyimino]-but-3-enoic acid benzhydryl ester 
• 90712-33-7 C₂₈H₃₇NO₆Si 
• 90712-34-8 C₂₉H₃₉NO₅Si 
• 94398-86-4 (1R,7R)-2-Benzoyl-4-methyl-9-oxo-6-oxa-2,8-diaza-bicyclo[5.2.0]non-3-ene-3-carboxylic acid benzhydryl ester 
• 90712-14-4 2-Diazo-4-hydroxy-3-oxo-butyric acid benzhydryl ester 
• 90712-31-5 4-Hydroxy-2-[(E)-hydroxyimino]-3-oxo-butyric acid benzhydryl ester 
• 90712-35-9 2-[(E)-Hydroxyimino]-3-hydroxymethyl-but-3-enoic acid benzhydryl ester 
• 90712-13-3 4-hydroxy-3-ketobutyric acid diphenylmethyl ester 

Relevant academic research and scientific papers

AN ALTERNATIVE SYNTHESIS OF THE 1-OXACEPHEM SKELETON

1-Oxacephem skeletons were constructed in a convergent manner starting from building blocks B and C, which were easily prepared from penicillin and diketene, respectively, followed by intramolecular carbene insertion reaction of the resulting intermediate