Catalytic activity of palladium complexes, PdCl2 (COD) and PdCl2(P(OPh)3)2, in methoxycarbonylation of iodobenzene

被引：13
作者：
Trzeciak, AM [1 ]
Wojtków, W [1 ]
Ziolkowski, JJ [1 ]
机构：
[1] Univ Wroclaw, Fac Chem, PL-50383 Wroclaw, Poland
来源：
INORGANIC CHEMISTRY COMMUNICATIONS | 2003年 / 6卷 / 07期
关键词：
carbonylation; iodobenzene; palladium catalyst; molten salt;
D O I：
10.1016/S1387-7003(03)00105-9
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The methoxycarbonylation of iodobenzene with PdCl2(COD) and PdCl2(P(OPh)(3))(2) (at 40 degreesC, 1 atm of CO, in methanol solution) produced benzoic acid methyl ester with the yield of 14% and 17%, respectively. The low yield of that reaction is caused by partial reduction of palladium to not active palladium black. It was found, that the addition of ammonium salt, (Bu4NCl)-Bu-n prevents palladium reduction to inactive Pd(0) form and increases the activity of the system. In reaction catalyzed by PdCl2(COD) at 40 degreesC and 1 atm of CO in methanol the yield of ester increased from 14% to 52% when (BU4NCl)-B-n was added. The yield of ester equal 96% was obtained with the same catalyst in molten (Bu4NCl)-Bu-n at 80 degreesC and 5 atm of CO. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：823 / 826
页数：4
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