Lithium hydroxide, monohydrate → 4-(3-(Benzyloxycarbonylamino)-2-fluorophenyl)-7-(2-methoxyethoxy)-9H-pyrido[3,4-b]indole-1-carboxylic acid

Participants

Reaction Steps

To a light orange, homogeneous solution of ethyl 4-(3-(benzyloxycarbonylamino)-2-fluorophenyl)-7-(2-methoxyethoxy)-9H-pyrido[3,4-b]indole-1-carboxylate (0.8002 g, 1.435 mmol) in THF (30.8 mL) and MeOH (10.25 mL) was added a solution of LiOH hydrate (0.241 g, 5.74 mmol) in water (2 mL). After 1.5 hr. the reaction was concentrated in vacuo. Water (10 mL) was added followed by 1 N aqueous HCl to pH 4-5 by litmus paper. The precipitate was filtered and washed with water, dried over Drierite under vacuum to give the desired product (0.705 g, 1.331 mmol, 93% yield) as a tan solid.

Provenance & Evidence