A High Yield Procedure for the Preparation of 2-Hydroxynitrostyrenes: Synthesis of Imines and Tetracyclic 1,3-Benzoxazines
作者:Víctor Tena Pérez、Ángel L. Fuentes de Arriba、Laura M. Monleón、Luis Simón、Omayra H. Rubio、Francisca Sanz、Joaquín R. Morán
DOI:10.1002/ejoc.201402016
日期:2014.5
easily prevented by using secondary amines to catalyze the reaction, which then afforded 2-hydroxynitrostyrenes in highyields. In addition, the stable imine that was formed by employing ammonium acetate underwent a reaction with phosgene to allow the preparation of benzoxazines in good yields.