反应详情

The crude (R)-ethyl 1-((1-(tert-butoxycarbonyl)pyrrolidin-3-yl)methyl)-6-iodo-4-oxo-1,4-dihydroquinoline-3-carboxylate (Intermediate 95, ˜4.4 mmol) was dissolved in 1,4-dioxane (20 mL) and 4.0M hydrogen chloride in 1,4-dioxane (20 mL) was added. The reaction mixture was stirred at room temperature for 1 h, and the solvent was removed in vacuo. The solid was then dried in a vacuum oven at 40° C. for 18 h to give 2.3 g (quant. yield) of (R)-ethyl-6-iodo-4-oxo-1-(pyrrolidin-3-ylmethyl)-1,4-dihydroquinoline-3-carboxylate hydrochloride as a yellow solid.

1. customthe solvent was removed in vacuo
2. customThe solid was then dried in a vacuum oven at 40° C. for 18 h