Mechanistic Studies of Highly Enantio- and Diastereoselective Aza-Petasis–Ferrier Rearrangement Catalyzed by Chiral Phosphoric Acid
作者:Masahiro Terada、Takazumi Komuro、Yasunori Toda、Toshinobu Korenaga
DOI:10.1021/ja5017206
日期:2014.5.14
anti- and enantioselective aza-Petasis-Ferrier (APF) rearrangement of hemiaminal vinyl ethers catalyzed by a chiral phosphoric acid was investigated by undertaking experimental and theoretical studies. The APF rearrangement is characterized by the following unique mechanistic features: (i) efficient optical kinetic resolution of the starting racemic hemiaminal vinyl ether, (ii) enantioconvergent process
通过实验和理论研究,研究了由手性磷酸催化的半胺乙烯基醚的高度抗和对映选择性 aza-Petasis-Ferrier (APF) 重排的精确机制。APF 重排具有以下独特的机制特征:(i)起始外消旋半缩醛乙烯基醚的有效光学动力学拆分,(ii)从外消旋半缩氨基乙烯基醚到光学活性 β-氨基醛产物的对映聚合过程,以及(iii)异常温度对对映选择性的影响(对映选择性随着反应温度的增加而增加)。进行了以下实验以阐明独特的机械特征以及揭示当前重排的总体方案: