(2S)-1,1,2-Triphenyl-1,2-ethanediol → Esomeprazole

Participants

Reaction Steps

A mixture of omeprazole (250 mg, 0.72 mmol) and (S)-1,1,2-triphenyl-1,2-ethanediol (315 mg, 1.08 mmol) was dissolved in a minimum volume of isopropyl alcohol (10 ml) at reflux temperature. On dissolution, the solution was cooled to ambient temperature slowly with vigorous stirring, and on reaching this temperature was stirred for a further 1 h. The precipitate was filtered, was washed with isopropyl alcohol (2×2 ml) and was dried in vacuo to afford (S)-omeprazole.2[(S)-1,1,2-triphenyl-1,2-ethanediol] inclusion complex (240 mg, 72%, 97% e.e.) as an off-white powder.

Provenance & Evidence