Palladium-Catalyzed Formation of C=C Bonds: A Regioselective Strategy for the Synthesis of 2-Vinylfurans by 1,2-H Shift of Palladium-Carbene Complexes
作者:Haiying Zhan、Xiulian Lin、Yanying Qiu、Zuodong Du、Peixian Li、Yongjian Li、Hua Cao
DOI:10.1002/ejoc.201300016
日期:2013.4
A convenient method to synthesize vinylfurans through a palladium-catalyzed cyclization/1,2-H shift sequence under mild conditions is described. This is an efficient strategy to synthesize 2-vinylfurans from ene–yne ketones, and the corresponding products are obtained in good yields.
N-chlorosuccinimide and dimedone in a onepot catalyst-free reaction at an ambient temperature. On the other hand, the same reaction when conducted with two equivalents of N-chlorosuccinimide under similar reaction conditions, exclusive formation of 2-benzoyl-3-(dimethylamino)-6,6-dimethyl-6,7-dihydrobenzofuran-4(5H)-ones were observed. Simple and metal-free reaction conditions, selective product formation
An Efficient Nanoparticle-Supported and Magnetically Recoverable Copper(I) Catalyst for Synthesis of Furans from Ene-yne-ketone
作者:Yi Liu、Zhan Liu、Yingde Cui
DOI:10.1002/cjoc.201400730
日期:2015.2
A magnetic nano‐supported Cu(I) catalyst was prepared and showed high activity for cyclization of ene‐yne‐ketone to synthesize furans. The catalyst was easily recovered from the reaction by using external magnets and reused 8 times without significant loss of its catalytic activity.
Silver-Catalyzed Highly Regioselective Synthesis of<font>α</font>-Carbonyl Furans from Enynones
作者:Zheng-Wang Chen、Miao-Ting Luo、Dong-Nai Ye、Zhong-Gao Zhou、Min Ye、Liang-Xian Liu
DOI:10.1080/00397911.2013.878027
日期:2014.6.18
A general and efficient method for the synthesis of a wide range of alpha-carbonyl furans is described here. The cyclization of enynone is catalyzed by AgBF4 in a fluorous biphasic system of perfluorodecalin and N,N-dimethylformamide. A variety of chain ketone and cyclic ketone substrates were used to investigate the scope of the reactions.