2-(3-cyano-5-dimethyl-5-(trifluoromethyl)furan-2(5H)-ylidene)malononitrile 、 2-(formylmethylene)-4,5-dimethyl-1,3-dithiole 在
吡啶 、
溶剂黄146 作用下,
以
乙醇 为溶剂,
以81%的产率得到(E)-2-{3-cyano-4-[3-(4,5-dimethyl-1,3-dithiol-2-ylidene)prop-1-enyl]-5-methyl-5-trifluoromethylfuran-2(5H)-ylidene}malononitrile