Convenient synthesis of tryptophols and tryptophol homologues by hydroamination of alkynes
作者:Vivek Khedkar、Annegret Tillack、Manfred Michalik、Matthias Beller
DOI:10.1016/j.tet.2005.05.093
日期:2005.8
A novel method is presented for the one-pot synthesis of substituted 3-(2-hydroxyethyl)- and 3-(3-hydroxypropyl)indoles (tryptophols and homotryptophols) from aryl hydrazines and silyl-protected ω-(hydroxyoalkyl)alkynes. Various tryptophol derivatives were prepared directly in good yield with excellent regioselectivity via a domino reaction sequence consisting of a titanium-catalyzed hydroamination
提出了一种从芳基肼和甲硅烷基保护的ω-(羟烷基)炔烃一锅合成取代的3-(2-羟乙基)-和3-(3-羟丙基)吲哚(色氨酸和高色氨酸)的新方法。通过由钛催化的炔烃加氢胺化,所得芳基的[3 + 3]重排以及随后的羟基脱保护反应组成的多米诺反应序列,以高收率和良好的区域选择性直接制备了多种三聚酚衍生物。