Hydrochloric Acid → HCID 86754076, compound

Participants

Reaction Conditions

Reaction Steps

56 mg (3R,4R)-3-[4-(4-Fluoro-benzoyloxy)-benzoylamino]-4-(4-hydroxy-benzoyloxy)-azepane-1-carboxylic acid tert-butyl ester was dissolved in 2 ml dimethoxyethane and 2 ml isopropanol (i-Pr-OH); after cooling to 0° C. the solution was slowly saturated with HCl-gas and stored in a refrigerator for 24 h. The solvent was completely removed in vacuo; the product was triturated with diethylether; the resulting suspension was stirred for several hours. The solvent was decanted and stirring was continued overnight after addition of another portion of fresh solvent. The product was filtered, washed with several portions of diethylether and dried in vacuo (0.1 mbar) at 50° C. 40 mg (85% yield) 4-Hydroxy-benzoic acid (3R,4R)-3-[4-(4-fluoro-benzoyloxy)-benzoylamino]-azepan-4-yl ester hydrochloride (1:1) was obtained as a yellow powder

Provenance & Evidence