N-Hydroxyacetamidine → (3EZ,5S)-1-[(2'-chloro 1,1'-biphenyl-4-yl)carbonyl]-5-(3-methyl-1,2,4-oxadiazol-5-yl)-3-pyrrolidinone O-methyloxime

Participants

Reaction Steps

Following the general methods as outlined in Example 1 (Method B), starting from (2S,4EZ)-1-(tert-butoxycarbonyl)-4-(methoxyimino)-2-pyrrolidine-carboxylic acid (Intermediate 2), N′-hydroxyethanimidamide (Intermediate 7) and 2′-chloro[1,1′-biphenyl]-4-carboxylic acid (Intermediate 10), the title compound was isolated, after flash-chromatography, as a mixture of E-/Z-isomers as an oil in 31% yield (98.5% purity by HPLC).

Provenance & Evidence