Benzofuran Derivatives from Alkynyl-Substituted Benzynes and Aryl Halides
作者:Weiming Yuan、Shengming Ma
DOI:10.1021/ol4032254
日期:2014.1.3
palladium(0)-catalyzed cascade reaction for the efficient synthesis of 2,3-disubstitutedbenzofuran derivatives 3 containing a 3-trisubstituted alkene functional group in moderate yields from alkynyl-substituted benzynes 1 and aryl halides 2 has been developed. This method provides an efficient and alternative approach to benzofurans which are very useful heterocyclic compounds with biological and pharmacological potentials
Selective Propargylation of Azo Compounds with Barium Reagents
作者:Akira Yanagisawa、Takanori Koide、Kazuhiro Yoshida
DOI:10.1055/s-0029-1219944
日期:2010.6
A Barbier-type propargylation of azo compounds with γ-trialkylsilylated propargylic bromides has been achieved using reactive barium as a low-valent metal in THF. Corresponding propargylated hydrazines (α-adducts) were exclusively formed not only from azobenzenes (diaryldiazenes) but also from dialkyl azodicarboxylates. This method is also applicable to γ-alkylated or γ-phenylated propargylic bromides
Metal-Catalyzed Cascade Rearrangements of 3-Alkynyl Flavone Ethers
作者:Yuan Xiong、Scott E. Schaus、John A. Porco
DOI:10.1021/ol400631b
日期:2013.4.19
Metal-mediated rearrangements of 3-alkynyl flavone ethers are reported. The overall process involves 5-endo enyne cyclization to a platinum. containing spiro-oxocarbenium intermediate which may be trapped with methanol to produce spirodihydrofurans or further rearranged to afford either allenyl chromanediones or benzofuranones.
Dumont,J.-L. et al., Bulletin de la Societe Chimique de France, 1967, p. 1197 - 1203
作者:Dumont,J.-L. et al.
DOI:——
日期:——
Stereochemistry of the Claisen Rearrangement<sup>1</sup>
作者:Elliot N. Marvell、John L. Stephenson、Josephine Ong