Mapping the Mechanism of Nickel-Ferrophite Catalysed Methylation of Baylis-Hillman-Derived S<sub>N</sub>2′ Electrophiles
作者:Andrew Novak、Maria José Calhorda、Paulo Jorge Costa、Simon Woodward
DOI:10.1002/ejoc.200801029
日期:2009.2
presence of ferrophite ligands has been investigated computationally and experimentally. The sense and degree of enantioselectivity attained is independent of both the leaving group and the isomeric structure of the initial allylic halide. DFT studies support the selective formation of a limited number of energetically favoured anti and syn π-allyl intermediates. The observed regio- and enantioselectivity
已经通过计算和实验研究了在亚铁盐配体存在下对 Baylis-Hillman 衍生的烯丙基亲电试剂的对映选择性 Ni 催化甲基化。获得的对映选择性的意义和程度与离去基团和初始烯丙基卤化物的异构结构无关。DFT 研究支持选择性形成有限数量的能量有利的反和顺 π-烯丙基中间体。观察到的区域选择性和对映选择性可以基于这些结构的能量学进行合理化。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)