Sodium Bicarbonate → (2S)-2-Ethoxy-3-{4-[2-(10H-phenoxazin-10-YL)ethoxy]phenyl}propanoic acid

Participants

Reaction Conditions

Reaction Steps

(2S)-2-Ethoxy-N-[(1S)-2-hydroxy-1-phenylethyl]-3-{4-[2-(10H-phenoxazin-10-yl)ethoxy]phenyl}propanamide (0.45 g, 0.84 mmol) was dissolved in a mixture of 1M sulphuric acid (17 ml) and dioxane/water (1:1.39 ml) and heated to 90° C. for 88 h. The pH of the mixture was adjusted to 3 by addition of an aqueous sodium hydrogen carbonate solution. The mixture was extracted with ethyl acetate (2×25 ml) and the organic phase was washed with water (50 ml), brine (25 ml), dried (Na2SO4) and evaporated. The residue was chromatographed over silica gel using a gradient of 50-75% ethyl acetate in petroleum ether to afford the title compound (0.19 g, 54%) as a white solid. mp: 89-90° C.

Provenance & Evidence