Structural Contributions to Autocatalysis and Asymmetric Amplification in the Soai Reaction
作者:Soumitra V. Athavale、Adam Simon、K. N. Houk、Scott E. Denmark
DOI:10.1021/jacs.0c05994
日期:2020.10.28
autocatalysis, providing insights into the role played by reactant and alkoxide structure. The alkynyl substituent favorably tunes catalyst solubility, aggregation, and conformation while modulating substrate reactivity and selectivity. The alkyl groups and the heteroaromatic core play further complementary roles in catalyst aggregation and substrate binding. In the study of these structure-activity relationships
嘧啶醛的二异丙基锌烷基化反应——Soai 反应,具有放大不对称自催化的惊人特性——在有机化学中占有独特的地位,是机理阐明的一个突出挑战。嘧啶和吡啶系统的“混合催化剂-底物”实验的新范式允许将催化与自动催化断开,从而深入了解反应物和醇盐结构所起的作用。炔基取代基有利于调节催化剂溶解性、聚集和构象,同时调节底物反应性和选择性。烷基和杂芳族核在催化剂聚集和底物结合中发挥进一步的互补作用。在研究这些构效关系时,鉴定了具有放大自催化作用的新型吡啶底物。三种代表连续的氮路易斯碱度强度的自催化系统的比较表明 N-Zn 结合事件的强度是如何影响自催化进程的主要因素。