A simple and an efficient method for the synthesis of six membered nitrogen containing heterocyclic compounds—1,3-oxazines from diethyl acetylene dicarboxylate, substituted anilines or amines and formaldehyde is reported. A versatile, economical and eco-friendly heterogeneous reagent silica sulfuric acid (Si-OSO3H) is used as a catalyst for this reaction.
报告采用了一种简单高效的方法,从
乙炔二
羧酸二
乙酯、取代
苯胺或胺和
甲醛中合成六位含氮
杂环化合物-1,3-噁嗪。该反应使用了一种多功能、经济、环保的异相试剂
二氧化硅硫酸(Si-OSO3H)作为催化剂。