Triphenylphosphine → HCID 58293300, compound

Participants

Reaction Steps

A solution of an optically-active compound of 3-methyl-2-(3-methyl-but-2-enyl)-azetidine-1,2-dicarboxylic acid di-tert-butyl ester (44.5 g) in chloroform/methanol (310 ml/310 ml) cooled to −70° C. was flowed ozone air for 1 hour. To the reaction mixture was added a solution of triphenylphosphine (44.7 g) in chloroform (45 ml) in small batches, and the mixture was warmed to room temperature. To the mixture were added saturated aqueous sodium thiosulfate solution (200 ml) and water (300 ml), and the mixture was extracted with chloroform (500 ml). The separated organic layer was washed with saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate and concentrated under reduced pressure to give the titled compound (95.0 g), which was used in the next step without further purification.

Provenance & Evidence