Catalyst-Free Synthesis of Polycyclic Spiroindolines by Cascade Reaction of 3-(2-Isocyanoethyl)indoles with 1-Sulfonyl-1,2,3-triazoles
作者:Cong Chen、Jing Chen、Han Wang、Ze-Feng Xu、Shengguo Duan、Chuan-Ying Li
DOI:10.1021/acs.joc.3c00800
日期:2023.7.7
A catalyst-free cascade reaction of 3-(2-isocyanoethyl)indoles and 1-sulfonyl-1,2,3-triazoles was realized. This dearomative spirocyclization provided an efficient protocol to synthesize a series of polycyclic indolines bearing spiro-α-carboline in moderate to high yields in one step under thermal reaction conditions.
A rhodium-catalyzed reaction of formamides with N-sulfonyl-1,2,3-triazoles is developed to formulate a new one-pot procedure for the direct synthesis of a-amino enaminones from terminal alkynes.
Mild Aminoacylation of Indoles and Pyrroles through a Three-Component Reaction with Ynol Ethers and Sulfonyl Azides
作者:Joshua S. Alford、Huw M. L. Davies
DOI:10.1021/ja5058967
日期:2014.7.23
An effective method for aminoacylation of indoles and pyrroles has been achieved. The transformation involves a multicomponent one-pot cascade reaction between indoles or pyrroles, ynol ethers, and sulfonylazides, creating four different bonds regioselectively through N-sulfonyltriazole intermediates. The oxo-tryptamines and oxo-pyrroloethanamines are generated in moderate to high yields under mild