One-step synthesis of 5,6-diaryl pyridine-2(1H)-thiones from isoflavones
作者:Juanjuan Wang、Zunting Zhang、Wenli Wang、Fangfang Liu
DOI:10.1039/c3ob27247h
日期:——
The one-step cyclocondensation of substituted isoflavones with cyanothioacetamide in the presence of sodium hydroxide gave an array of 3-cyano-5,6-diaryl pyridine-2(1H)-thiones in good yields. The procedure involves base-mediated ring opening of the isoflavones and subsequent Knoevenagel condensation between the 1,3-dicarbonyl intermediate generated from the isoflavones and cyanothioacetamide, followed