作者:Joseph C. Allen、Gabriele Kociok-Köhn、Christopher G. Frost
DOI:10.1039/c1ob06586f
日期:——
The rhodium-catalysed enantioselective 1,4-addition of organoboron reagents to arylidene Meldrum's acids as acceptors, allows convenient access to 4-arylchroman-2-ones with good to excellent levels of enantioselectivity. The use of silyl-protected dioxaborinanes as donors was found to be advantageous to achieving good yields of product under anhydrous conditions.
铑催化的手性选择性1,4-加成反应:以芳叉型梅尔魏因酸作为受体,有机硼试剂作为供体,方便地合成具有良好至优异手性选择性的4-芳基色满-2-酮。使用硅基保护的二氧硼烷作为供体,在无水条件下有利于实现高产率的产品合成。