Facile Strategy for the Synthesis of Furans Utilizing Silver(I)-Promoted Addition/Oxidative Cyclization of 1,3-Dicarbonyl Compounds and Alkynoates
作者:Wei-Bing Liu、Cui Chen、Qing Zhang
DOI:10.1080/00397911.2011.615102
日期:2013.3.1
Abstract The addition/oxidative cyclization of alkynoates with 1,3-dicarbonyl compounds in the presence of Ag(I) leads to polysubstituted furans. The reaction corresponds to the construction of a furan fragment, which also provides a new way to form the C-O bond. GRAPHICAL ABSTRACT
摘要 在 Ag(I) 存在下,炔酸酯与 1,3-二羰基化合物的加成/氧化环化产生多取代呋喃。该反应对应于呋喃片段的构建,这也为形成 CO 键提供了新的途径。图形概要
Synthetic Approach to Polysubstituted Furans: An Efficient Addition/Oxidative Cyclization of Alkynoates and 1,3-Dicarbonyl Compounds
A novel and reliable method for the direct construction of polysubstituted furans is reported. The key transformation involves Sn(II)- and Cu(I)-involved addition/oxidative cyclization of alkynoates and 1,3-dicarbonyl compounds in the presence of 2,3-dichloro-5,6-dicyano-benzoquinone.
Domino Michael–O-alkylation reaction: one-pot synthesis of 2,4-diacylhydrofuran derivatives and its application to antitumor naphthofuran synthesis
The reaction of enolates of 1,3-dicarbonyl compounds with α-halo-α,β-unsaturated carbonyl compounds affords 2,4-diacyldihydrofuran derivatives in the presence of DBU in THF. Chemical manganese dioxide oxidation of the hydrofurans leads to 2,4-diacylfuran derivatives. Application of the protocol enables short-step syntheses of antitumor naphthofuran natural products.