A General Convergent Strategy for the Synthesis of Tetra-Substituted Furan Fatty Acids (FuFAs)
作者:Yamin Wang、Gareth J. Pritchard、Marc C. Kimber
DOI:10.1002/ejoc.202000234
日期:2020.5.22
Tetrasubstituted Furan Fatty acids (FuFAs) are a vital and ubiquitous class of natural products, that upon ingestion afford significant health benefits. Herein, a general and modular approach to their total synthesis is presented, delivering short yet efficient syntheses of two key FuFAs, 11D3 (F4) and 11D5 (F6), in 52 % and 48 % overall yield, respectively. Significantly, this method offers an effective route
Au-Catalyzed [2 + 3] Annulation of Enamides with Propargyl Esters: Total Synthesis of Cephalotaxine and Cephalezomine H
作者:Xiao-Yan Ma、Xian-Tao An、Xian-He Zhao、Ji-Yuan Du、Yu-Hua Deng、Xiang-Zhi Zhang、Chun-An Fan
DOI:10.1021/acs.orglett.7b01202
日期:2017.6.2
A novel Au-catalyzed [2 + 3] annulation reaction of enamides with propargyl esters has been developed, providing a new method for expeditious assembly of synthetically useful functionalized 1-azaspiro[4.4]nonane building blocks. Based on this key annulation, strategic installation of the pivotal azaspirocyclic core, followed by constructing the benzazepine unit via Witkop cyclization, led to the divergent
Synthesis of tetrasubstituted pyrroles by palladium-catalyzed cyclization of propargylic carbonates with β-enamino esters
作者:Masahiro Yoshida、Chiyuki Sugimura
DOI:10.1016/j.tetlet.2013.02.019
日期:2013.4
The reaction of propargylic carbonates with beta-enamino esters in the presence of palladium catalyst is described. Various tetrasubstituted pyrroles were regioselectively synthesized via a successive nucleophilic cyclization. (c) 2013 Elsevier Ltd. All rights reserved.