Formic Acid → 2-amino-3-(1H-indol-3-yl)-N-(2-methoxybenzyl)propanamide

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Reaction Steps

Formic acid (9.0 ml, 238.540 mmol) was added to a stirring solution of 3-(1H-indol-3-yl)-N-(2-methoxybenzyl)-2-(N-triphenylmethylamino)propanamide (14.11 g, 23.763 mmol) in anhydrous methylene chloride under a nitrogen atmosphere at 0° C. After 4 hours, the reaction mixture was concentrated to an oil on a rotary evaporator and redissolved in diethyl ether and 1.0N hydrochloric acid. The aqueous layer was washed twice with diethyl ether and basified with sodium hydroxide to a pH greater than 12. The product was extracted out with methylene chloride (4×). The organic extracts were combined, dried over anhydrous sodium sulfate, filtered, and concentrated on a rotary evaporator to a white foam. The compound 3-(1H-indol-3-yl)-2-amino-N-(2-methoxybenzyl)propanamide (7.52 g, 21.397 mmols) was isolated giving a 90% yield. No further purification was necessary.

Provenance & Evidence