Acetic Anhydride → HCID 131725413, compound

Participants

Reaction Steps

A hydrazono pyrrolidine derivative obtained by the general method outlined in Example 17, e.g. (2S,4EZ)-1-([1,1′-biphenyl]-4-ylcarbonyl)-4-hydrazono-N-[(2RS)-2-hydroxy-2-phenylethyl]-2-pyrrolidinecarboxamide (51 mg, 0.11 mmol) was dissolved in pyridine (1 mL). Acetic anhydride (3 eq, 32 μl, 0.35 mmol) was added, and the mixture was stirred overnight. The solvent was evaporated and the resultant crude reaction mixture was purified by column chromatography using DCM/MeOH (20:1) to collect the desired product, e.g. (2S,4EZ)-4-(acetylhydrazono)-1-([1,1′-biphenyl]-4-ylcarbonyl)-N-[(2RS)-2-hydroxy-2-phenylethyl]-2-pyrrolidinecarboxamide as a mixture of two isomers as a colorless solid in 73% yield (98.4% purity by HPLC).

Provenance & Evidence