苯乙烯的相转移催化溴-羟基化  

PHASE TRANSFER CATALYZED BROMO-HYDROXYLATION OF STYRENE

作　　者：颜世刚[1] 宋树忠[1] 

机构地区：[1]中国科学院大连化学物理研究所,大连116012

出　　处：《应用化学》1990年第2期69-70,共2页Chinese Journal of Applied Chemistry

摘　　要：β-苯乙醇是一个重要香料品种,工业上主要由苯乙烯溴-羟基化、环氧化、加氢而制得,其中关键一步是溴-羟基化反应,这是在油-水两相中进行的亲电加成反应。 本文根据前人的工作,在反应中加进了不同分子量的聚乙二醇,考察了它们对反应的影响,讨论了聚乙二醇的相转移催化行为。Polyethylene glycol(PEG) is used as a phase transfer catalyst in the bromo-hydroxylationof styrene.Experimental results showed that the yield of β-blomo-α-hydroxyethylbenzeneand the reaction rate are enhanced by addition of PEG into the system, and the effectincreased remarkably with the increasing amount of sulfuric acid. The maximum, yield ofβ-bromo-α-hydroxyethylbenzen is 92%. A possible mechanism is proposed.

关 键 词：苯乙烯 溴羟基化 聚乙二醇 苯乙醇 

分 类 号：O625.34[理学—有机化学]