3-(1-Methyl-4-piperidinyl)-1H-indol-5-ol → 2,6-difluorobenzenesulfonic acid 3-(1-methylpiperidin-4-yl)-1H-indol-5-ylester

Participants

Reaction Steps

By a method similar to Example 31, using 2,6-difluorobenzenesulfonyl chloride (256 mg, 1.2 mmol) and 3-(1-methylpiperidin-4-yl)-5-hydroxy-1H-indole (231 mg, 1.0 mmol), and 0.2 N sodium hydroxide (5.5 mL, 1.1 mmol) gave 400 mg (98%) of the title compound as an off white powder were obtained. The product was recrystallized from ethyl acetate/methanol/hexanes: mp=214-215° C.; MS(m/e): 407 (M+1); Calculated for C20H20F2N2O3S: C, 59.10; H, 4.96; N, 6.89. Found: C, 59.07; H, 5.16; N, 6.73.

Provenance & Evidence