Rh-catalyzed addition of boronic acids to alkynes for the synthesis of trisubstituted alkenes in a biphasic system - Mechanistic study and recycling of the Rh/m-TPPTC catalyst
作者:Emilie Genin、Véronique Michelet、Jean-Pierre Genêt
DOI:10.1016/j.jorganchem.2004.07.025
日期:2004.11
The versatile preparation of trisubstituted alkenes via selective Rh-catalyzed arylation of alkynes is described in water and in a water/toluene biphasic system. For hydrophobic alkyl alkynes, the reaction afforded either alkenes or dienes depending on the temperature and the solvent conditions. Aryl, heteroaryl, silylated and alkyl substituted alkynes reacted equally well with various boronic acids
在水和水/甲苯双相体系中,通过选择性的Rh催化的炔烃芳基化反应制备三取代烯烃的通用方法,对于疏水性烷基炔烃,根据温度和溶剂条件,反应可生成烯烃或二烯。芳基,杂芳基,甲硅烷基化和烷基取代的炔烃与各种硼酸反应良好,从而区域选择性地以高收率(65-99%)生成官能化的烯基衍生物。在甲苯/水混合物或水中对这种机理进行了研究,涉及乙烯基铑络合物。公开了具有优异的产率(92-96%)和烯烃纯度的Rh / m- TPPTC系统的有效再循环。