Diisopropylamine → 5-(p-Bromophenyl)-5,6,7,8-tetrahydroimidazo[1,5-a]pyridine

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Reaction Steps

A solution of lithium diisopropylamide, prepared at 0° from 0.12 ml of diisopropylamine and 0.33 ml of n-butyllithium (2.5M) in 2 ml of tetrahydrofuran under nitrogen, is added to a solution of 0.13 ml of N,N,N', N'-tetramethylethylene diamine and 0.124 g of 5-(3-chloropropyl)-1-p-bromobenzyl-1H-imidazole in 2 ml of tetrahydroduran at -78°. The reaction mixture is stirred for 3.5 hours, quenched at -78° with saturated ammonium chloride solution and extracted with methylene chloride (3×10 ml). The organic extracts are dried over sodium sulfate and evaporated to yield the title compound (c) which is purified by conversion to the hydrochloride salt.

Provenance & Evidence