3-(1-Methyl-4-piperidinyl)-1H-indol-5-ol → 4-Methylphenylsulfonic acid 3-(1-methylpiperidin-4-yl)-1H-indol-5-yl ester

Participants

Reaction Steps

By a method similar to Example 31, using 4-methylbenzenesulfonyl chloride (228 mg, 1.2 mmol) and 3-(1-methylpiperidin-4-yl)-5-hydroxy-1H-indole (230 mg, 1.0 mmol), 0.2 N sodium hydroxide (5.5 mL, 1.1 mmol) gave 400 mg of crude product. The crude product was recrystallized from ethyl acetate to give 305 mg (79%) of a white powder: mp=186-187° C. MS(m/e): 384 (M+); Calculated for C21H24N2O3S: Calcd: C, 65.60; H, 6.29; N, 7.29. Found: C, 65.50; H, 6.35; N, 7.23.

Provenance & Evidence