Tandem Cyclopropane Ring-Opening/Conia-ene Reactions of 2-Alkynyl Indoles: A [3 + 3] Annulative Route to Tetrahydrocarbazoles
作者:Huck K. Grover、Terry P. Lebold、Michael A. Kerr
DOI:10.1021/ol102627e
日期:2011.1.21
A Zn(NTf2)2catalyzed tandem reaction consisting of a nucelophilic ringopening of 1,1-cyclopropanediesters by 2-alkynyl indoles followed by a Conia-ene ring closure results in the efficient one-step synthesis of tetrahydrocarbazoles. The adducts may be further elaborated to carbazoles.
Synthetic Strategy for Aryl(alkynyl)phosphinates by a Three-Component Coupling Reaction Involving Arynes, Phosphites, and Alkynes
作者:Su Hyun Ji、Soomin Kim、Ghilsoo Nam、Duck-Hyung Lee、Seo-Jung Han
DOI:10.1021/acs.orglett.2c03231
日期:2022.11.18
straightforward method for the synthesis of aryl(alkynyl)phosphinates was developed via a three-component coupling reaction involving arynes, phosphites, and alkynes. An array of aryl(alkynyl)phosphinates were produced from both aryl and aliphatic group-substituted acetylenes. This operationally simple reaction is tolerant to many functional groups, affording various aryl(alkynyl)phosphinates in moderate to
One-Pot Catalytic Asymmetric Synthesis of Tetrahydrocarbazoles
作者:Qiong-Jie Liu、Wen-Guang Yan、Lijia Wang、X. Peter Zhang、Yong Tang
DOI:10.1021/acs.orglett.5b01909
日期:2015.8.21
A one-pot asymmetric synthesis of 1,2,3,4-tetrahydrocarbizoles has been developed via an enantioselective [3 + 3] annulation of 2-alkynylindoles and donor acceptor cyclopropanes. In the presence of chiral Lewis acids as catalysts, a series of optically active tetrahydrocarbazoles were furnished in high yields (63-87%) With good to excellent levels of enantioselectivity (up to 94% ee).