摘要
研究了以ＰｄＣｌ２－ＣｕＣｌ２－ＰＰｈ３为催化剂体系，甲基乙基酮、乙二醇二甲醚为溶剂，苯乙烯与一氧化碳及甲醇立体选择生成２－苯基丙酸甲酯的反应．对不同的催化剂前体催化烯烃氢酯基化反应进行了研究，得知ＣｕＣｌ２在此催化反应中起着立体控制作用．同时考察了影响反应的各种因素如溶剂、反应温度、反应压力、不同的膦配体等．实验结果表明，该反应的最佳条件是：反应温度８０℃，反应压力４．０—６．０ＭＰａ，反应时间２４ｈ，最好的溶剂是乙二醇二甲醚及甲基乙基酮．利用该催化剂体系对不同结构的烯烃催化反应进行了研究。
Styrene was converted into esters of 2 phenyl propionic acid with high yields in the presence of a PdCl 2 CuCl 2 PPh 3 catalyst system. Typical reaction conditions are: temperature, 80℃; P CO =4.0-6.0 MPa; styrene/ROH/Pd=55/155/1; =0.013 mol/L; //PPh 3=1/2.3/3.1; solvent: methyl ethyl ketone, 1,2 dimethoxethane, THF, or toluene; reation time: 24 h. The experimental results showed that CuCl 2 was not only a promoter of catalyst, but also a regioselective controller in this catalyst system. This catalyst system was used for catalyzing hydroesterification of alkenes with different structures. Good regioselectivity and high yield were obtained when styrene was used as a substrate.
出处
《分子催化》
EI
CAS
CSCD
1996年第6期407-412,共6页
Journal of Molecular Catalysis(China)
基金
国家自然科学基金
中国石油化工科学院资助
关键词
苯乙烯
催化
氢酯基化反应
催化剂
烯烃
Styrene, Regioselective catalysis, Hydroesterification, PdCl 2 CuCl 2 PPh 3
