A new procedure for the preparation of 2-vinylindoles and their [4+2] cycloaddition reaction
作者:Yaseen Ali Mosa Mohamed、Fuyuhiko Inagaki、Ryohei Takahashi、Chisato Mukai
DOI:10.1016/j.tet.2011.05.064
日期:2011.7
A new approach for the synthesis of 2-vinylindole derivatives by 5-exo mode cyclization of 2-(3-silyloxymethylallenyl)anilines was developed. The starting allenylanilines were easily prepared by the Stille coupling of o-iodoaniline and allenylstannanes. The formed 2-vinylindole derivatives were transformed into several carbazole derivatives via the [4+2] cycloaddition reaction with suitable dienophiles
开发了一种新的方法,可以通过2-(3-甲硅烷氧基甲基烯丙基)苯胺的5- exo模式环化合成2-乙烯基吲哚衍生物。起始的烯基苯胺很容易通过邻碘苯胺和烯基斯坦酮的斯蒂勒偶联来制备。形成的2-乙烯基吲哚衍生物通过与合适的亲二烯体的[4 + 2]环加成反应转化为几种咔唑衍生物。