Propanal → HCID 66754902, compound

Participants

Reaction Steps

A solution of 52 mg (0.08 mmol) of 5-chloro-1-(4-methoxybenzenesulfonyl)-3-[2-oxo-1-phenyl-2-(4-piperidin-4-ylpiperazin-1-yl)-ethyl]-1,3-dihydrobenzimidazol-2-one (Example 128) in 3 ml of THF was mixed with 5.32 mg (0.09 mmol) of propionaldehyde and 70 mg of MP-triacetoxyborohydrde resin (Argonaut, 2.55 mmol/g, 0.17 mmol) and shaken at room temperature overnight. The solid phase reagent was filtered off and washed with dichloromethane. The filtrate was concentrated under reduced pressure. The residue was purified by chromatography on silica gel (mobile phase gradient 8-11% methanol in dichloromethane). Yield: 33.2 mg (60%) of colorless solid

Provenance & Evidence