A novel synthesis of indole derivatives by the reaction of<i>N</i>-arylhydroxamic acids with malononitrile
作者:Yukihiko Tomioka、Kimiko Ohkubo、Hiroshi Maruoka
DOI:10.1002/jhet.5570440222
日期:2007.3
An approach to indole derivatives from N-arylhydroxamic acids and malononitrile via a [3,3]-sigmatropic rearrangement and intramolecular cyclization is described. Reactions of N-arylhydroxamic acids 1a-c, 2a-c and 3a-c with malononitrile in the presence of triethylamine at room temperature gave the corresponding α-cyanoacetamide derivatives 4a-c, 5a-c, 6a-c, 7a-c and 8a-c. Thermal treatment of 4a-c
描述了一种通过[3,3]-σ重排和分子内环化从N-芳基异羟肟酸和丙二腈中吲哚衍生物的方法。的反应Ñ -arylhydroxamic酸1A-1C,2A-C和3A-C ,在室温下三乙胺存在下丙二腈,得到相应的α氰基乙酰胺衍生物4A-C,5A-C,图6A-C,图7A-C和8a-c。用碱,例如三乙胺和甲醇钠对4a-c,5a-c和7a-c进行热处理,导致分子内环化和脱酰基,得到相应的吲哚衍生物9-11。