Copper-Catalyzed Coupling Cyclization of <i>gem</i>-Difluoroalkenes with Activated Methylene Carbonyl Compounds: Facile Domino Access to Polysubstituted Furans
作者:Xuxue Zhang、Wenpeng Dai、Wei Wu、Song Cao
DOI:10.1021/acs.orglett.5b01123
日期:2015.6.5
A novel and efficient CuI-catalyzed synthesis of 2,3,5-trisubstituted furans was developed via coupling cyclization of gem-difluoroalkenes with active methylene carbonyl compounds such as 1,3-dicarbonyl compounds, acetoacetonitrile, and phenylsulfonylacetone with the assistance of a base. Commercial availability of substrates or reagents, good to high isolated yields, and excellent functional group
通过宝石-二氟烯烃与活性亚甲基羰基化合物(例如1,3-二羰基化合物,乙酰乙腈和苯磺酰丙酮)的偶联环化,开发了新颖,高效的CuI催化的2,3,5-三取代呋喃合成方法。底物或试剂的商业可得性,良好或较高的分离产率以及出色的官能团相容性,使这种转化成为合成各种呋喃的有力工具。提出了一种可能的机制,涉及到烯丙基酮。