[3-Cyano-4,5-dimethyl-5-(trifluoromethyl)furan-2(5H)-ylidene]malononitrile → 2-[4-[6-(4-dibutylamino-2-methoxyphenyl)-1,3,5-hexatrienyl]-3-cyano-5-methyl-5-trifluoromethyl-2(5H)-furanylidene]propanedinitrile

Participants

Reaction Conditions

Reaction Steps

To 5 ml of ethanol were added 130 mg (0.41 mmol) of 5-(4-dibutylamino-2-methoxyphenyl)-2,4-pentadienal and 115 mg (0.45 mmol) of 2-(3-cyano-4,5-dimethyl-5-trifluoromethyl-2(5H)-furanylidene) propanedinitrile, and the mixture was stirred with heating at 50° C. for 2 hours. The precipitate was separated by filtration and purified by silica gel column chromatography to give 187 mg of a greenish brown crystal (yield: 82.5%; mp: 168-172° C.)

Provenance & Evidence