Regioselective De Novo Synthesis of Cyanohydroxypyridines with a Concerted Cycloaddition Mechanism
作者:Jin-Yong Lu、John A. Keith、Wei-Zheng Shen、Markus Schürmann、Hans Preut、Timo Jacob、Hans-Dieter Arndt
DOI:10.1021/ja804078v
日期:2008.10.8
An efficient cycloaddition reaction of 1-alkoxy-1-azadienes with alpha,alpha-dicyanoalkenes is described, which gives facile access to highly substituted 3-hydroxypyridines in very good yields and with complete regiocontrol and chemoselectivity. The reaction path was investigated in detail by quantum mechanics calculations, reporting that a concerted cycloaddition mechanism and thermodynamic control
描述了 1-烷氧基-1-氮杂二烯与 α,α-二氰基烯烃的有效环加成反应,该反应可以轻松获得高度取代的 3-羟基吡啶,收率非常好,并且具有完全的区域控制和化学选择性。通过量子力学计算详细研究了反应路径,报告称协同环加成机制和热力学控制协同作用于观察到的选择性。