Silver-Catalyzed Highly Regioselective Synthesis ofα-Carbonyl Furans from Enynones
摘要:
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.
Facile synthesis of cyanofurans via Michael-addition/cyclization of ene–yne–ketones with trimethylsilyl cyanide
作者:Yue Yu、Yang Chen、Wanqing Wu、Huanfeng Jiang
DOI:10.1039/c6cc08320j
日期:——
We have developed a Michael-addition/cyclization procedure between ene-yne-ketones and TMSCN under metal-free conditions. A wide range of cyanofurans were delivered in high yields, which could be further transformed to a...
Visible-light photoredox catalyzed synthesis of polysubstituted furfuryl trifluoroacetamide derivatives
作者:Taotao Chen、Wei Wu、Zhiqiang Weng
DOI:10.1016/j.tet.2019.130751
日期:2019.12
A visible-light photoredox catalyzed reaction of enynones with 2,2,2-trifluoroacetamide to access polysubstituted furfuryl trifluoroacetamide derivatives under mild reaction conditions is reported. This transformation proceeds through the furan-substituted carbene intermediate, which subsequently undergoes an intermocular trapping process by 2,2,2-trifluoroacetamide to produce the desired furfuryl trifluoroacetamides. (C) 2019 Elsevier Ltd. All rights reserved.