Guanidinum Chloride as Dehydrocyclization Agent in the Synthesis of 2-Fuctionalized (4<i>H</i>)-3,1-Benzoxazine-4-ones
作者:Farzad Nikpour、Asrin Bahmani、Forugh Havasi、Mahnaz Sharafi-Kolkeshvandi
DOI:10.1002/jhet.1649
日期:2014.1
A facile and expedient route for the synthesis of 2‐ethoxy‐ and 2‐(ethylcarboxylate)‐(4H)‐3,1‐benzoxazine‐4‐ones is described using guanidinium chloride as a safe and convenient dehydrocyclization agent. High yields of the products obtain under mild reaction conditions without need to use of any catalyst and with easy work‐up of the reaction mixture.
描述了一种使用氯化胍作为安全,方便的脱氢环化剂合成2-乙氧基和2-(乙基羧酸酯)-(4 H)-3,1-苯并恶嗪-4-酮的简便方法。在温和的反应条件下,无需使用任何催化剂即可轻松获得高收率的产品,而且反应混合物的后处理也很容易。