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本文介绍了用三乙醇胺脱水环合制得中间体4-吗啉乙醇,以及将2-甲基-2苯氧基丙酸不经氯化,直接与4-吗啉乙醇在二甲苯中其沸脱水酯化制备咳必定的方法,并讨论了工艺条件较原用合成方法简便。
This paper describes the intermediate 4-morpholinoethanol prepared by dehydration cyclization with triethanolamine and its non-chlorinated 2-methyl-2-phenoxypropionic acid directly with its 4-morpholineethanol in xylene Dehydration and esterification of cough must be prepared, and discussed the process conditions than the original synthesis method is simple.