Co_2(CO)_8催化苯乙烯氢酯基化制α-苯基丙酸酯研究  

Study on the Preparation of α-phenylpropionate by Hydroesterification of Styrene Catalyzed by Cobalt Carbonyl

作　　者：王志会[1] 于晓琳 吕志果[1] 郭振美[1] 

机构地区：[1]青岛科技大学化工学院,山东青岛266042

出　　处：《分子催化》2011年第5期387-392,共6页Journal of Molecular Catalysis(China)

基　　金：山东省教育厅基金;青岛科技大学引进人才启动基金

摘　　要：以Co2(CO)8为催化剂,对苯乙烯与CO及甲醇氢酯基化反应制α-苯基丙酸甲酯的反应进行了研究,并根据实验结果提出了可能的催化反应机理.考察了催化剂用量、配体、溶剂、CO压力及反应温度等因素对氢酯基化反应的影响.结果表明:以甲苯为溶剂,在n(Co2(CO)8)/n(苯乙烯)=0.06,吡啶为配体且n(吡啶)/n(Co)=2,CO压力6.0 MPa、反应温度95℃的较佳条件下反应12 h,苯乙烯的转化率接近100%,α-苯基丙酸甲酯的收率达到89.07%,异正比24.35.Using Co2 （CO）8 as a catalyst, the synthesis of methyl α-phenylpropionate by hydroesterification of styrene with CO and methanol was studied, and a possible reaction mechanism has also been proposed. The dosage of catalyst, promoter, solvent and reaction conditions e. g. CO pressure, reaction temperature were investigated. The optimum conditions were obtained as follows： n（ Cos （CO）s ）/n （styrene） = 0.06, toluene as solvent, pyridine as promoter and n（pyridine）/n（Co） = 2, CO pressure 6.0 MPa, reaction temperature 95 ℃ for 12 h. Under this conditions, the conversion of styrene approached 100% and the yield of methyl α-phenylpropionate reached 89.07 % , meanwhile i/n = 24.35.

关 键 词：八羰基钴 苯乙烯 氢酯基化 α-苯基丙酸甲酯 

分 类 号：O643.32[理学—物理化学]