5,5-Dimethyl-3-{[3-(trifluoromethyl)phenyl]amino}cyclohex-2-en-1-one → 4-(4-Bromophenyl)-7,7-dimethyl-1-(3-(trifluoromethyl)phenyl)-3,4,7,8-tetrahydroquinazoline-2,5(1H,6H)-dione

Participants

Reaction Steps

A solution of 1-bromo-4-(chloro(isocyanato)methyl)benzene (435 mg, 1.77 mmol) in dichloromethane (5 mL) is added to a solution of 5,5-dimethyl-3-(3-(trifluoromethyl)-phenylamino)cyclohex-2-enone (intermediate 8, 500 mg, 1.77 mmol) in dichloromethane (15 mL) and the mixture is heated at reflux over night. All volatiles are evaporated and the residue is purified by flash chromatography on silica (gradient cyclohexane/ethyl acetate 90:10 to 60:40). Yield: 389 mg; ESI mass spectrum: [(79Br)-M+H]+=493, [(81Br)-M+H]+=495; Retention time HPLC: 1.38 min (Z002—002).

Provenance & Evidence