Practical One‐Pot Multistep Synthesis of 2H‐1,3‐Benzoxazines Using Copper, Hydrogen Peroxide, and Triethylamine
作者:Rachel Trammell、Alexandra Cordova、Shuming Zhang、Sunipa Goswami、Richel Murata、Maxime A. Siegler、Isaac Garcia‐Bosch
DOI:10.1002/ejoc.202100783
日期:2021.8.26
Herein, a simple one-pot synthesis of 2H-1,3-benzoxazines from imino-pyridines substrates using copper, H2O2, and NEt3 is described. Mechanistic studies were performed and suggested that cyclization occurred via the formation of 2-azallyl intermediates. Understanding of the cyclization mechanism allowed the developing of reaction conditions by using catalytic amounts of Cu.
本文介绍了一种使用铜、H 2 O 2和 NEt 3从亚氨基吡啶底物一锅法合成 2H-1,3-苯并恶嗪的简单方法。进行了机理研究并表明环化是通过形成 2-氮杂烯丙基中间体而发生的。对环化机制的了解允许通过使用催化量的 Cu 来开发反应条件。