反应详情

The above prepared 4-(5-chloro-2-ethoxycarbonyl-3-methyl-benzofuran-6-yloxy)-piperidine-1-carboxylic acid tert-butyl ester (1.457 g, 3.327 mmol) was dissolved in 8 mL of dioxane and treated with HCl (16.5 mL of 4N [dioxane], 20 eq.) and the mixture kept at ambient temperature for 2 h. Careful evaporation of all solvents and drying yielded 1.36 of the title product as hydrochloride as white crystals, which was further processed without additional purification.

1. customCareful evaporation of all solvents
2. customdrying