One-pot synthesis of substituted indolines via a copper-catalyzed sequential multicomponent/C–N coupling reaction
作者:Hongwei Jin、Bingwei Zhou、Zhi Wu、Yang Shen、Yanguang Wang
DOI:10.1016/j.tet.2010.11.094
日期:2011.2
One-pot synthesis of 2-(N-sulfonylimino)indolines has been developed. The procedure combines the copper-catalyzed three-component reaction of sulfonyl azides, o-bromophenylacetylenes, and amines and the copper-catalyzed intramolecular C–N coupling in one sequence, which afforded the products in moderate to good yields. The resulting 2-(N-sulfonylimino)indolines could be easily transformed to pharmaceutically
catalytic amount of Fe(TPP)Cl and Zn dust. The reaction precludes the traditional, more favored click reaction between an organic azide and alkynes, and instead proceeds by an unprecedented metalloradicalactivation. The method is anticipated to advance access to the construction of important basic nitrogen heterocycles, which will in turn enable discoveries of new drug candidates.
Cobalt‐Catalyzed Cascade Reaction of Ynamides and 1,3‐Dicarbonyl Compounds for Selective Synthesis of Differently Sized
<i>N</i>
‐Heterocycles
作者:Biao Zhang、Xu‐Heng Yang、Jian Huang、Cheng‐an Tao、Jianfang Wang
DOI:10.1002/adsc.202201002
日期:2023.3.7
manifold with various 1,3-dicarbonylcompounds and halogenated N-allyl ynamides was accomplished under alkaline reaction conditions, facilitating the synthesis of differently sized N-heterocycles. A large array of products was prepared to demonstrate the selective synthesis of N-heterocycles of different ring sizes (5-, 6-, and 7-membered rings) via cobalt catalysis. The reaction has broad substrate
Synthesis of benzothiophene derivatives from dilithio reagents, sulfur, and electrophiles via electrophilic cyclization
作者:Zitao Wang、Weizhi Geng、Hanliu Wang、Shaoguang Zhang、Wen-Xiong Zhang、Zhenfeng Xi
DOI:10.1016/j.tetlet.2011.10.098
日期:2011.12
Benzothiophene derivatives were synthesized in high yields from readily available o-(alkynyllithio)aryllithio compounds, sulfur, and 2 equiv of acid chlorides or other electrophiles. An acid chloride-induced electrophilic cyclization resulted in the formation of the thiophene ring. (C) 2011 Elsevier Ltd. All rights reserved.