Practical synthesis of amides from alkynyl bromides, amines, and water
摘要:
A general and efficient method for the synthesis of a wide range of amides is described here. The reactions were conducted under convenient conditions and provided secondary and tertiary amides in moderate to excellent yields. A variety of amines and substituted alkynyl bromides were used to investigate the scope of the reactions. (C) 2011 Elsevier Ltd. All rights reserved.
The Ketene-Surrogate Coupling: Catalytic Conversion of Aryl Iodides into Aryl Ketenes through Ynol Ethers
作者:Wenhan Zhang、Joseph M. Ready
DOI:10.1002/anie.201405036
日期:2014.8.18
tert‐Butoxyacetylene is shown to undergo Sonogashira coupling with aryliodides to yield aryl‐substituted tert‐butyl ynol ethers. These intermediates participate in a [1,5]‐hydride shift, which results in the extrusion of isobutylene and the generation of aryl ketenes. The ketenes are trapped in situ with multiple nucleophiles or undergo electrocyclic ring closure to yield hydroxynaphthalenes and quinolines
Practical synthesis of amides from alkynyl bromides, amines, and water
作者:Zheng-Wang Chen、Huan-Feng Jiang、Xiao-Yan Pan、Zai-Jun He
DOI:10.1016/j.tet.2011.06.045
日期:2011.8
A general and efficient method for the synthesis of a wide range of amides is described here. The reactions were conducted under convenient conditions and provided secondary and tertiary amides in moderate to excellent yields. A variety of amines and substituted alkynyl bromides were used to investigate the scope of the reactions. (C) 2011 Elsevier Ltd. All rights reserved.
Construction of C–X (X = S, O, Se) Bonds <i>via</i> Lewis Acid-Promoted Functionalization of Trifluoromethylarenes
trifluoromethylarenes through C–Fbondactivation provides an attractive pathway for rapid access to difluorobenzylic substructures in producing pharmaceuticals and agrochemicals. However, recentadvances in this area have been confined to C–C(H) bond construction, thus limiting the diversity of the accessible motifs. In contrast, the selective formation of a carbon–heteroatom bond via C–Fbond functionalization