Efficient activation of 2-Iminomethylpyridine/Cobalt-Based alkyne [2+2+2}cycloaddition catalyst by addition of a silver salt

被引：56
作者：
Goswami, Avijit [1 ]
Itoa, Taichi [1 ]
Okamoto, Sentaro [1 ]
机构：
[1] Kanagawa Univ, Dept Mat & Life Chem, Kanagawa Ku, Yokohama, Kanagawa 2218686, Japan
来源：
ADVANCED SYNTHESIS & CATALYSIS | 2007年 / 349卷 / 14-15期
关键词：
catalytic cycloaddition; cobalt; iminomethylpyridine; silver triflate; substituted benzenes;
D O I：
10.1002/adsc.200700188
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The addition of silver triflate (AgOTf) or silver hexafluoroantimonate (AgSbF6) significantly increased the activity of the 2-(arylimino)methyl-pyridine/cobalt(II) chloride hexahydrate (COCl2 center dot 6H(2)O)/zinc catalyst in alkyne cyclotrimerizations thereby accelerating the reaction and enabling the use of unactivated, simple internal alkynes as the monoyne substrate: The rate of reaction was found to be highly dependent on the nature of the counter anion (X-) and the ligand (L) in the postulated cationic cobalt(I) complex [LCo(l)]X-+(-).
引用
收藏
页码：2368 / 2374
页数：7
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