Convenient synthesis of 2-substituted indoles from 2-ethynylanilines with tetrabutylammonium fluoride
作者:Akito Yasuhara、Yuichi Kanamori、Masashi Kaneko、Atsushi Numata、Yoshinori Kondo、Takao Sakamoto
DOI:10.1039/a808842j
日期:——
The cyclization reaction of various 2-ethynylanilines, which were easily synthesized from 2-haloanilines by the palladium-catalyzed reaction with terminal alkynes, with tetrabutylammonium fluoride (TBAF) to yield 2-substituted indoles proceeded at refluxing or room temperature in THF in excellent yields without affecting the bromo, chloro, cyano, ethoxycarbonyl, and ethynyl groups.
通过钯催化的末端炔烃与2-卤代苯胺的反应,易于合成的各种2-乙炔基苯胺,在四丁基氟化铵(TBAF)的作用下,以优异的产率在回流或室温下的四氢呋喃中进行环化反应,生成2-取代的吲哚,且不影响溴、氯、氰基、乙氧羰基和乙炔基团。