Piperitenone → (+)-Pulegone

Participants

Reaction Steps

A 500 ml capacity autoclave was charged with 150 g (1 mol) of piperitenone, 18.6 mg (0.04 mmol) of [Rh(cod)2]PF6, 47.2 mg (0.04 mmol) of (S)-DIBM-SEGPHOS, 14.8 mg (0.02 mmol) of BrPPh3(CH2)4PPh3Br and 7.5 ml of ethyl acetate, and the reaction was carried out at 50° C. for 20 hours under a hydrogen pressure of 3 MPa. After completion of the reaction, hydrogen was purged, and the reaction solution was concentrated and distilled under a reduced pressure to obtain 136.8 g of d-pulegone (yield 90%).

Provenance & Evidence