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13612-34-5 34688-71-6 22364-68-7欧盟法规
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CAS号553-94-6 2,5-二甲基溴苯 | CAS号53957-33-8 2,5-二甲基苯甲醇 | CAS号610-72-0 2,5-二甲基苯甲酸 | CAS号824-45-3 2,5-二甲基苯甲基氯 | CAS号143-33-9 氰化钠 | CAS号75-05-8 乙腈 | CAS号106-42-3 对二甲苯 | CAS号95-72-7 2-氯-1,4-二甲基苯 | CAS号151-50-8 氰化钾 | CAS号13612-34-5 2,5-二甲基苯乙酸 | CAS号23068-44-2 2,5-二甲基苯胺 | CAS号6972-51-6 2,5-二甲基苯乙醇 | CAS号6975-06-0 2-(2,5-dimethyl... | CAS号75476-82-3 5,8-dimethyliso... | CAS号55312-97-5 2,5-二甲苯基乙酰氯2,5-二甲基苯甲醇置于氯化亚砜体系中,用 二甲基亚砜 用作溶剂,化学反应生成2,5-二甲基苯乙腈
参考文献:Wagner,Peter J.; Meador,Michael A.; Zhou,Boli,Journal Of The American Chemical Society,1991,Vol. 113,# 25,P. 9630-9639
标题:Wagner,Peter J.; Meador,Michael A.; Zhou,Boli,Journal Of The American Chemical Society,1991,Vol. 113,# 25,P. 9630-9639
专利信息
专利号:GB-1567300-A
优先权日:1977-03-28
标 题:Synthesis of biocidal 2-aryl-1,3-cycloalkane-diones and their enol esters
专利号:US-8664424-B2
优先权日:2011-03-13
标 题:Method for preparing 2,5-dimethylphenylacetic acid
发明人:WANG PING; FAN XIAOBIN; LIN XINGJUN; HE ZHAOHUI
权利人:WANG PING; FAN XIAOBIN; LIN XINGJUN; HE ZHAOHUI; LIANHE CHEMICAL TECHNOLOGY CO LTD; JIANGSU LIANHE CHEMICAL TECHNOLOGY CO LTD
摘要:Provided is a method for preparing 2,5-dimethylphenylacetic acid, wherein p-xylene is mixed with paraformaldehyde and concentrated hydrochloric acid in a solvent of ion liquid to obtain 2,5-dimethyl benzyl chloride by the chloromethylation reaction. Then, 2,5-dimethyl benzyl chloride is introduced into a reactor with an acid binding agent and a solvent, the carbonylation and hydrolysis reaction is conducted in the presence of a catalyst to obtain 2,5-dimethylphenylacetic acid. The present process has new route, less synthesis steps, simple operation, lower cost, increased yield, and is friendly to the environment. Therefore, the method is suitable for industrial production.