作者:V. V. Dotsenko、S. G. Krivokolysko、S. V. Shishkina、O. V. Shishkin
DOI:10.1007/s11172-012-0291-3
日期:2012.11
Oxidation of (E)-3-aryl-2-cyanoprop-2-enethioamides with 32% H2O2 under mild conditions gave (E)-3-aryl-2-cyano-1-iminioprop-2-ene-1-sulfenates in 70–88% yields. Under the conditions of the Radziszewski reaction (H2O2, 10% aqueous KOH) or upon prolonged treatment with H2O2, (E)-3-aryl-2-cyanoprop-2-enethioamides underwent transformations leading to complex mixtures of oxidation products. In some cases, 3-aryloxirane-2,2-dicarboxamides were isolated from those mixtures in low yields (<20%). Treatment of 3-arylamino-2-cyanoprop-2-enethioamides with the system H2O2/KOH in ethanol afforded (arylaminomethylidene)malononitriles.
在温和的条件下,用 32% 的 H2O2 氧化 (E)-3- 芳基-2-氰基-1-亚氨基丙-2-烯-1-硫酰胺,可得到产率为 70-88% 的 (E)-3-芳基-2-氰基-1-亚氨基丙-2-烯-1-硫酸盐。在 Radziszewski 反应(H2O2、10% KOH 水溶液)的条件下或长时间用 H2O2 处理时,(E)-3-芳基-2-氰基-1-亚氨基丙-2-烯-1-硫代酰胺发生转化,生成复杂的氧化产物混合物。在某些情况下,从这些混合物中分离出了 3-芳基环氧乙烷-2,2-二甲酰胺,但产量较低(20%)。用乙醇中的 H2O2/KOH 系统处理 3-芳基氨基-2-氰基丙-2-烯硫酰胺,可得到(芳基氨基亚甲基)丙二腈。