Palladium-catalyzed one-pot synthesis of polysubstituted furans from alkynoates and 2-yn-1-ols
作者:Huawen Huang、Huanfeng Jiang、Hua Cao、Jinwu Zhao、Dabin Shi
DOI:10.1016/j.tet.2011.12.033
日期:2012.4
Easily accessible propargyl vinyl ethers are found to be acyclic precursors to construct furan derivatives. According to the reactive behavior of the substrates and the regulation of reaction conditions, three synthetic routes to polysubstituted furans via palladium-catalyzed reactions of propargyl vinyl ethers in situ-prepared from alkynoates and 2-yn-1-ols are presented herein. These methods could have potential application in synthetic and pharmaceutical chemistry for its facilitation and accessible starting materials. (C) 2011 Elsevier Ltd. All rights reserved.
Divergent Synthesis of Oxa‐Cyclic Nitrones through Gold(I)‐Catalyzed 1,3‐Azaprotio Transfer of Propargylic α‐Ketocarboxylate Oximes: Experimental and DFT Studies
α‐ketocarboxylate oximes, a new type of alkynyl oximes featuring an ester tether, has been explored by taking advantage of gold catalysis. The incorporation of an oxygen atom to the chain of alkynyl oximes led to the formation of two different oxa‐cyclicnitrones. It was found that internal alkynyl oximes with an E‐configuration deliver five‐membered nitrones, whereas terminal alkynyl oximes with an E‐configuration