Sodium Thiosulfate → 2-Acetylamino-5-propionyl-4-trifluoromethyl-benzoic acid methyl ester

Participants

Reaction Steps

A solution of 2-acetylamino-5-(1-hydroxy-propyl)-4-trifluoromethyl-benzoic acid methyl ester (262 mg, 0.82 mmol) in DCM (1.3 mL) was added to a solution of Dess-Martin periodinane (556 mg, 1.31 mmol) in DCM (2.6 mL) and the mixture was stirred for 1 h at r.t. It was then poured into aqueous sodium thiosulfate and this mixture was extracted with EtOAc. The organic phase was then washed twice with aqueous potassium hydrogencarbonate (pH=8), once with brine, dried over anhydrous sodium sulfate, filtered and concentrated in vacuo to give crude 2-acetylamino-5-propionyl-4-trifluoromethyl-benzoic acid methyl ester as a white solid which was used without further purification in the next step, ESI-MS: m/z 318 [M+H]+.

Provenance & Evidence