72881-16-4

Upstream product

• 132-98-9 penicillin V potassium 
• 78-95-5 chloroacetone 

Downstream Products

• 84161-67-1 [(2R,3S)-2-Acetylsulfanyl-3-methoxy-4-oxo-3-(2-phenoxy-acetylamino)-azetidin-1-yl]-(triphenyl-λ⁵-phosphanylidene)-acetic acid 2-oxo-propyl ester 
• 84161-66-0 2-[(2R,3S)-2-Acetylsulfanyl-3-methoxy-4-oxo-3-(2-phenoxy-acetylamino)-azetidin-1-yl]-3-methyl-but-2-enoic acid 2-oxo-propyl ester 
• 84161-68-2 (5R,6S)-6-Methoxy-3-methyl-7-oxo-6-(2-phenoxy-acetylamino)-4-thia-1-aza-bicyclo[3.2.0]hept-2-ene-2-carboxylic acid 2-oxo-propyl ester 
• 84161-65-9 (2S,4S,5R,6S)-6-Methoxy-3,3-dimethyl-4,7-dioxo-6-(2-phenoxy-acetylamino)-4λ⁴-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid 2-oxo-propyl ester 

Relevant academic research and scientific papers

Synthesis and Reactivity of 6α-Methoxy-2-methyl-6β-phenoxyacetamido-penem-3-carboxylates

Representatives of the title compounds have been prepared from phenoxymethylpenicillinic acid; the β-lactam linkage of these compounds is exceptionally reactive.