Hexahydro-1,4-diazepine → HCID 178420600, compound

Participants

Reaction Steps

A suspension of 4-bromobenzimidazole (42 mmol), homopiperazine (256 mmol) and NaOt-Bu (59 mmol) in dry o-xylene, under N2, is treated with a catalytic amount of Pd (OCOCH3)2.P(t-Bu)3 (P/Pd=4), heated at 120° C. for 3 hr, cooled to room temperature and diluted with water. The aqueous mixture is extracted with ethyl acetate. The extracts are combined, dried over MgSO4 and concentrated in vacuo to give a residue. The residue is purified by flash chromatography to give 4-(homopiperazin-1-yl)benzimidazole.

Provenance & Evidence