HARRISON J. M.; INCH T. D., TETRAHEDRON LETT., 1981, 22, NO 7, 679-682
作者:HARRISON J. M.、 INCH T. D.
DOI:——
日期:——
Oxidation of 2-cyanoprop-2-enethioamides with hydrogen peroxide
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.