The Mukaiyama Aldol Reactions for Congested Ketones Catalyzed by Solid Acid of Tin(IV) Ion-exchanged Montmorillonite
作者:Satoshi Takehira、Yoichi Masui、Makoto Onaka
DOI:10.1246/cl.131095
日期:2014.4.5
Tin(IV) ion-exchanged montmorillonite (Sn-Mont) was found to be an excellent solid acid catalyst for the Mukaiyama aldol reactions of congested ketones with silicon enolates from ketones as well as esters. It was disclosed that Sn-Mont was far more active than other metal ion- or proton-exchanged montmorillonites and typical homogeneous acid catalysts such as TMSOTf and BF3·OEt2.
研究发现,锡(IV)离子交换蒙脱土(Sn-Mont)是一种优异的固体酸催化剂,适用于拥挤酮与来自酮和酯的硅烯醇盐的Mukaiyama aldol反应。研究揭示,Sn-Mont的活性远高于其他金属离子或质子交换蒙脱土,以及典型的均相酸催化剂,如三甲基硅基三氟甲磺酸酯(TMSOTf)和三氟化硼乙醚配合物(BF3·OEt2)。