94398-86-4

Upstream product

• 66437-20-5 diphenylmethyl 4-bromo-acetoacetate 
• 86823-92-9 (1R,5S)-3-phenyl-7-oxo-4-oxa-2,6-diazabicyclo[3.2.0]hept-2-ene 
• 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 
• 94398-76-2 4-Formyloxy-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 
• 90712-07-5 (1R,5S)-6-(tert-Butyl-dimethyl-silanyl)-3-phenyl-4-oxa-2,6-diaza-bicyclo[3.2.0]hept-2-en-7-one 

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