Synthesis of substituted 2-iminothiopyrans from aryl ethylidene malononitriles

摘要

The addition of arylethylidene malononitriles 1 to dimethyl trithiocarbonate in the presence of sodium hydride in benzene gives 4-arylj-2-imino-6-methylthio-2H-thiopyran-3-carbonitriles 5 in good yields.