2-[4-(6-氯-2-苯并噁唑氧基苯氧基)]丙酸乙酯的合成  

SYNTHESIS OF ETHYL 2-[4-(6-CHLORO-2-BENZOXAZOLOXY)]

作　　者：汪进[1] 金婵[1] 王化南[1] 齐虹[1] 

机构地区：[1]哈尔滨工业大学

出　　处：《哈尔滨师范大学自然科学学报》1998年第4期77-80,共4页Natural Science Journal of Harbin Normal University

摘　　要：用邻胺基酚或水扬酸为原料经三步反应制得中间体２，６－二氯苯并唑，用对苯二酚和２－氯丙酸经一步合成了另一中间体２－（４－羟基苯氧基）－丙酸乙酯，再使两个中间体在相转移催化剂催化下缩合得到除草剂２－（４－（６－氯－２－苯并唑氧基苯氧基）丙酸乙酯．全程收率为５１％．In synthesis of the highly effective herbcide ethyl 2-[4-(6-chloro-2-benzoxazoloxy)] propionate, first, utilizing three and one reaction steps, the intermediate 2,6-dichlorbenzoxazole from o-amindphenoxy and urea or o-hydroxybenzoic acid and oxyammonia hydrochloride and the other intermediate ethyl 2-(4-hydroxyphenoxy)-propionate from para-dihydroxy-benzene and 2-chloropropionacid have been prepared, respectively. Then, the title compound has synthesized from the two intermediates in the presence of the phase transfer catalyst PEG. The total yield is 51%.

关 键 词：除草剂 合成 羟基苯氧基 丙酸乙酯 芳氧丙酸类 

分 类 号：TQ457.21[化学工程—农药化工]