Efficient one-pot synthesis of tryptamines and tryptamine homologues by amination of chloroalkynes
作者:Vivek Khedkar、Annegret Tillack、Manfred Michalik、Matthias Beller
DOI:10.1016/j.tetlet.2004.02.085
日期:2004.4
A new method was developed for the one-pot synthesis of substituted 3-(2-aminoethyl)- and 3-(3-aminopropyl)indoles from commercially available aryl hydrazines and chloroalkylalkynes. Various tryptamine derivatives were prepared directly in good yield with excellent regioselectivity. The method involves a new domino reaction sequence consisting of a titanium-catalyzed amination of the chloroalkylalkyne
开发了一种新方法,用于从市售的芳基肼和氯烷基炔烃一锅法合成取代的3-(2-氨基乙基)-和3-(3-氨基丙基)吲哚。直接以高收率和优异的区域选择性直接制备了各种色胺衍生物。该方法涉及一个新的多米诺骨牌反应序列,该序列由钛催化的氯代烷基炔烃的胺化反应,所得芳基的[3 + 3]重排以及氯化物被氨进行亲核取代。