反应详情

Methanesulfonyl chloride (0.178 g, 1.55 mmol), compound of example 129 (0.55 g, 1.2 mmol) and triethylamine (1 mL) in CHCl3 (10 mL), were reacted as described in example 3, method A to obtain (±)-trans-methanesulfonic acid 4-[2-(2-chloro-phenyl)-5,7-dimethoxy-4-oxo-4H-chromen-8-yl]-1-propyl-piperidin-3-yl ester. This was dissolved in dry IPA at 80-90° C., anhydrous NaOAc (0.49 g, 5.98 mmol) was added, and the reaction mixture was processed as in example 3, method A to give an oily residue which was purified using a silica gel column and 1% IPA+1% liquor NH3 in CHCl3 as eluant to obtain the title compound.