Transition-Metal-Catalyzed Domino Reactions: Efficient One-Pot Regiospecific Synthesis of Highly Functionalized Polysubstituted Furans from Electron-Deficient Alkynes and 2-Yn-1-ols
作者:Huanfeng Jiang、Hua Cao、Huawen Huang
DOI:10.1055/s-0030-1258461
日期:2011.4
Based on the reactive behavior of different transition-metal catalysts, three methods for the synthesis of highly functionalized polysubstituted furan derivatives are presented: (i) copper(I) iodide catalyzed regiospecific synthesis of furan aldehydes/ketones from alkynols and diethyl but-2-ynedioate under atmospheric pressure; (ii) nano-Cu2O-catalyzed domino process for the regioselective synthesis
As heterogeneous catalysts and nanoparticle support materials, CNTs have attracted great interest in organic chemistry. This paper reports facile CuO/CNTs-catalyzed cyclization to form furan derivatives from electron-deficient alkynes and α-hydroxy ketones. It represents a facile synthetic route, and the eco-friendly catalyst can be easily separated by filtration and reused.
Transition metal‐catalyzed domino reactions have been used as powerful tools for the preparation of polysubstituted furans in a one‐pot manner. In this paper, an efficient synthetic method was developed for the construction of tri‐ or tetrasubstituted furans from electron‐deficient alkynes and 2‐yn‐1‐ols by a silver‐catalyzed domino reaction. It is especially noteworthy that a 2,3,5‐trisubstituted
Direct Palladium-Catalyzed C-4 Arylation of Tri-substituted Furans with Aryl Chlorides: An Efficient Access to Heteroaromatics
作者:Hai Yang、Zhishuo Zheng、Jian Zeng、Huajie Liu、Bing Yi
DOI:10.5012/bkcs.2012.33.8.2623
日期:2012.8.20
A series of functionalized furans were synthesized by way of a palladium -catalyzed coupling reaction of 2,3,5trisubstituted furans with aryl chlorides through C-H bond cleavages at C-4position. The feature of the reaction was facilitative preparation of furan derivatives with good functional group tolerance. All reactions gave the desired products in moderate to good yields in the presences of BuAd2P
通过钯催化的2,3,5三取代呋喃与芳基氯通过C-4位CH键断裂的偶联反应合成了一系列功能化呋喃。该反应的特点是便于制备具有良好官能团耐受性的呋喃衍生物。在 BuAd2P 和 t-BuOK 的存在下,在 DMF 中 120 o C 15 小时后,所有反应均以中等至良好的收率得到所需产物。
Ruthenium-catalyzed coupling reaction of 2,3,5-trisubstituted furans with aryl halides through C–H bond cleavages
作者:Hua Cao、Haiying Zhan、Dongsheng Shen、Hong Zhao、Yi Liu
DOI:10.1016/j.jorganchem.2011.06.009
日期:2011.9
A variety of functionalized furans were synthesized by way of a ruthenium-catalyzed coupling reaction of 2,3,5-trisubstituted furans with aryl halides through C-H bond cleavages. The feature of the reaction was facilitative preparation of furan derivatives good functional group tolerance. All reactions gave the desired products in moderate to good yields (56-89%) in the presences of [RuCl(2)(p-cymene)] and K(2)CO(3) in NMP at 120 degrees C. (C) 2011 Elsevier B.V. All rights reserved.