Asymmetric Amplification Coupling Enantioselective Autocatalysis and Asymmetric Induction for Alkylation of Azaaryl Aldehydes
作者:Carlo Romagnoli、Bora Sieng、Mohamed Amedjkouh
DOI:10.1002/ejoc.201500508
日期:2015.7
Herein, we describe a chemical system combining asymmetric amplification of Soai's autocatalyst alongside a catalytic addition of Zn(iPr)2 to azaaryl aldehydes. Thus, Soai autocatalyst is amplified in situ from 11 to > 98 % ee and concomitantly catalyzes the alkylation of pyridine aldehydes to provide alkanols with up to 99 % ee. Also, exceptional amplifications of ee in one cycle are observed for
在此,我们描述了一种化学系统,该系统将 Soai 的自催化剂的不对称放大与 Zn(iPr)2 催化加成到氮杂芳基醛相结合。因此,Soai 自动催化剂在原位从 11% ee 放大到 > 98% ee,并伴随催化吡啶醛的烷基化以提供高达 99% ee 的烷醇。此外,对于整个反应中产生的两种化合物,在一个循环中观察到 ee 的异常放大,这可能是反应网络中相互作用的结果,耦合对映选择性自催化和不对称诱导。