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

Participants

Reaction Steps

By a method similar to Example 31, using benzenesulfonyl chloride (280 μL, 2.2 mmol), 3-(1-methylpiperidin-4-yl)-5-hydroxy-1H-indole (418 mg, 1.8 mmol) in 0.2 N sodium hydroxide (10 mL, 2.0 mmol) and THF (6 mL) gave 650 mg of an off white solid. The crude product was recrystallized from ethyl acetate to give 505 mg (75%) of tan needles: mp=192-194° C.; MS(m/e): 370 (M+); Calculated for C20H22N2O3S: C, 64.84; H, 5.99; N, 7.56. Found: C, 64.92; H, 6.19; N, 7.67.

Provenance & Evidence