the synthesis of alkenyl halides are described under microwave-assisted conditions. The reaction proceeds through the condensation between sec-alcohols and terminalacetylenes and regeoselective hydro halogenation across the triple bond in the presence of simple and commercially available zinc halides. Three halide sources could successfully be employed to give a diverse range of alkenyl halide products
FeX<sub>3</sub>-Promoted Intermolecular Addition of Benzylic Alcohols to Aromatic Alkynes: A Mild and Efficient Strategy for the Synthesis of Alkenyl Halides
作者:Kai Ren、Min Wang、Lei Wang
DOI:10.1002/ejoc.200901020
日期:2010.1
A convenient, effective, mild and simple strategy has been developed for the synthesis of alkenyl halides by the intermolecular addition of benzylic alcohols to aromatic alkynes. The reactions were carried out in the presence of iron(III) bromide or chloride in 1,2-dibromoethane without additives in air at room temperature. Alkenyl bromides and chlorides were obtained with high regio- and stereoselectivity