[3-Cyano-4,5-dimethyl-5-(trifluoromethyl)furan-2(5H)-ylidene]malononitrile → 2-[4-[4-(4-dibutylamino-2-methoxyphenyl)-1,3-butadienyl]-3-cyano-5-methyl-5-trifluoromethyl-2(5H)-furanylidene]propanedinitrile

Participants

Reaction Conditions

Reaction Steps

In 5 ml of ethanol were dissolved 145 mg (0.50 mmol) of 3-(4-dibutylamino-2-methoxyphenyl)propenal and 140 mg (0.55 mmol) of 2-(3-cyano-4,5-dimethyl-5-trifluoromethyl-2(5H)-furanylidene)propanedinitrile. After the mixture was stirred with heating at 50° C. for 2 hours, the solvent was evaporated off. The residue was purified by silica gel column chromatography to give 242 mg of a dark greenish brown crystal (yield: 92.1%; mp: 169-170° C.).

Provenance & Evidence