Palladium-catalyzed regioselective C-2 arylation of 7-azaindoles, indoles, and pyrroles with arenes
作者:Joydev K. Laha、Rohan A. Bhimpuria、Dilip V. Prajapati、Neetu Dayal、Shubhra Sharma
DOI:10.1039/c6cc00133e
日期:——
A palladium-catalyzed regioselective C-2 arylation of 7-azaindoles, indoles, and pyrroles with arenes has been developed. The study unveils that a critical substrate dependent acid concentration is essential for achieving exclusive...
Development of an Efficient Procedure for Indole Ring Synthesis from 2-Ethynylaniline Derivatives Catalyzed by Cu(II) Salts and Its Application to Natural Product Synthesis
作者:Kou Hiroya、Shin Itoh、Takao Sakamoto
DOI:10.1021/jo035528b
日期:2004.2.1
The development of efficient methods for the indole synthesis catalyzed by Cu(II) salts and its applications were investigated. Cu(OAc)2 has been proved to be the best catalyst for the synthesis of various 1-p-tolylsulfonyl or 1-methylsulfonylindoles, which have both electron-withdrawing and electron-donating groups on the aromatic ring and C2 position of indoles. For the primary aniline derivatives
Abstract Indoles, dihydroisoquinolines, and dihydroquinolines were efficiently prepared by ruthenium-catalyzed heterocyclizations of aromatic homo- and bis-homopropargyl amines/amides in the presence of an amine/ammonium base-acid pair. These regioselective 5-endo and 6-endo cyclizations most probably occur by nucleophilic trapping of key ruthenium-vinylidene intermediates. Indoles, dihydroisoquinolines
Transfer of activation from indoles to alcohols: A new method for the synthesis of aminoethylindoles
作者:Michael A. Eissenstat、John D. Weaver
DOI:10.1016/0040-4039(95)00229-6
日期:1995.3
Transfer of a sulfonyl group from an indole nitrogen to a β-amino alkoxide generates an indole anion and an aminoethylsulfonate which react to give aminoethylindoles.
磺酰基从吲哚氮到β-氨基醇盐的转移产生吲哚阴离子和氨基乙基磺酸盐,它们反应生成氨基乙基吲哚。
Convenient synthesis of 2-substituted indoles from 2-ethynylanilines with tetrabutylammonium fluoride
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.