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

页码：2368 / 2374

页数：7

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