p-Toluenesulfonic acid → (E)-2-(2-fluoro-5-(trifluoromethyl)benzylidene)-6-methoxy-5-morpholino-2,3-dihydro-1H-inden-1-one

Participants

Reaction Conditions

Reaction Steps

To a solution of 13 (100 mg, 0.404 mmol) in toluene 10 mL was added 2-fluoro-5-(trifluoromethyl)benzaldehyde 75 (77.7 mg, 0404 mmol). PTSA (153.8 mg, 0809 mmol) was added and the reaction mixture stirred at 120° C. for 6 h. The reaction mass was diluted with ethyl acetate and washed with water (3×25 mL). The organic layer was dried over sodium sulphate and concentrated to get the crude compound 76 which was purified through flash chromatography by using 100-200 mesh silica gel. The compound (E)-2-(2-fluoro-5-(trifluoromethyl)benzylidene)-6-methoxy-5-morpholino-2,3-dihydro-1H-inden-1-one 76 was eluted at 34% ethyl acetate in hexane to afford yellow coloured solid.

Provenance & Evidence