Highly Stereoselective Metal-Mediated Entry to Functionalized Tetrahydrothiophenes by Barbier-Type Carbonyl-Addition Reactions
作者:Benito Alcaide、Pedro Almendros、Teresa Martínez del Campo
DOI:10.1002/ejoc.200800067
日期:2008.5
Reactions of tetrahydrothiophene-3-carbaldehydes with stabilized organometallic reagents were investigated in aqueous media. Tetrahydrothiophene-3-carbaldehydes and a variety of stabilized organic halides undergo stereocontrolled coupling under Barbier-type conditions in the presence of different metals (zinc, tin, indium) and additives [ammonium chloride, hydrobromic acid, hafnium(IV) chloride, bismuth(III)
在水性介质中研究了四氢噻吩-3-甲醛与稳定的有机金属试剂的反应。四氢噻吩-3-甲醛和各种稳定的有机卤化物在不同金属(锌、锡、铟)和添加剂 [氯化铵、氢溴酸、氯化铪(IV)、铋( III) 氯化物]。如果适用,羰基加成过程的区域化学非常好。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)