Ammonium Hydroxide → 2-amino-9-benzyl-9H-pyrido[2,3-b]indole-3-carboxamide

Participants

Reaction Steps

To a solution of (2E)-3-(1-benzyl-2-ethoxy-1H-indol-3-yl)-2-cyanoacrylamide (vi-a, 2.00 g, 5.79 mmol) in MeOH (150 mL) was added NH4OH (30% weight solution of NH3 in water, 100 mL). The reaction was stirred at RT overnight. The reaction was concentrated under reduced pressure and the crude solid was triturated with H2O. The solid was filtered and triturated again with ether. A yellow solid was collected by suction filtration to yield 2-amino-9-benzyl-9H-pyrido[2,3-b]indole-3-carboxamide (vii-a, 1.23 g, 63%). NH4OAc standard conditions. DAD Retention time =7.25 min. M+H=317. 1H NMR (300 MHz, DMSO-d6): δ 8.77 (s, 1H), 7.83 (d, J=7.8 Hz, 1H), 7.62 (br s, 2H), 7.40 (d, J=7.7 Hz, 1H), 7.31-7.16 (m, 9H), 5.52 (s, 2H).

Provenance & Evidence