Titanium-catalyzed cycloisomerization of 1,6-dienes.: Regio- and stereoselective synthesis of exo-methylenecycloalkanes

被引：35

作者：

Okamoto, S ^{[1
]}

Livinghouse, T ^{[1
]}

机构：

[1] Montana State Univ, Dept Chem, Bozeman, MT 59717 USA

来源：

ORGANOMETALLICS | 2000年 / 19卷 / 08期

关键词：

D O I：

10.1021/om991024l

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Cycloisomerization of 1,6-dienes 1 in the presence of a catalytic amount of n-BuMgBr and a variety of organotitanium complexes such as Cp2TiCl2, Cp(MeO)TiCl2, Cp(Me2N)TiCl2, or CpTi[(TMS)(2)NC-(NCy)(2))Cl-2 provided the corresponding 2-methyl-1-methylenecyclopentanes 2 with high efficiency. In contrast, catalysis using the more sterically encumbered complex ethylenebis(tetrahydroindenyl)titanium dichloride led to the predominant formation of methylenecyclohexanes 3.

引用

页码：1449 / 1451

页数：3

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