1,4-Dioxane hydrochloride → 4-(2-(4-(Trifluoromethyl)benzyl)-2,3,4,5-tetrahydro-1h-pyrido[4,3-b]indole-8-carboxamido)piperidine dihydrochloride salt

Participants

Reaction Steps

A solution of tert-butyl 4-(2-(4-(trifluoromethyl)benzyl)-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole-8-carboxamido)piperidine-1-carboxylate (9 in Scheme 1(c)), 340 mg, 0.6 mmol) in 4 N HCl/dioxane (10.0 mL) was allowed to stir at room temperature for 2 h. The reaction mixture was then concentrated and the resulting residue was triturated with ethyl ether to give 4-(2-(4-(trifluoromethyl)benzyl)-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole-8-carboxamido)piperidine dihydrochloride salt as a white solid (320 mg, 100%).

Provenance & Evidence