Hydrochloric Acid → HCID 57108693, compound

Participants

Reaction Steps

To a solution of 2-[8-[N-tert-butoxycarbonyl-N-[(2S)-2-h ydroxy-3-phenoxypropyl]amino]-6,7,8,9-tetrahydro-5H-benzocyclohepten-2-yloxy]acetic acid ethyl ester (3.60 g) in ethanol (20 ml) was added 1N sodium hydroxide (7 ml) under ice-cooling, and the mixture was stirred at room temperature for 2 hours. The resulting mixture was acidified with hydrochloric acid to pH 2 and extracted with ethyl acetate. The organic layer was washed with brine, dried over magnesium sulfate and evaporated in vacuo. The residue was chromatographed (hexane-ethyl acetate) over silica gel to afford 2-[8-[N-tert-butoxycarbonyl-N-[(2S)-2-hydroxy-3-phenoxypropyl]amino]-6,7,8,9-tetrahydro-5H-benzocyclohepten-2-yloxy]acetic acid (3.2 g).

Provenance & Evidence