The use of various phase-transfer catalysts in the alkylation of phenol and substituted phenols with 1-bromo-3-chloropropane was investigated. When a quarternary ammonium salt of the general formula R′4N+ X-, where R′ = alkyl with a minimum chain length of 4 was used, a mixture of 1-aryloxy-3-chloropropane and 1-aryloxy-3-bromopropane resulted. The effect of counterion, added potassium bromide, and catalysts other than quarternary ammonium salts were assessed for the halopropylation of 2,5-dimethylphenol.
研究了在
1-溴-3-氯丙烷与
酚及其取代
酚的烷基化反应中使用各种相转移催化剂的情况。当使用一般式为R′4N+ X-的季
铵盐时,其中R′为最小链长为4的烷基,结果得到1-芳氧-3-
氯丙烷和1-芳氧-3-
溴丙烷的混合物。评估了对2,5-二甲基
酚进行卤丙基化反应时,反离子、添加的
溴化钾以及其他催化剂(除了季
铵盐)的影响。