Directing Effects of a Silyl Group on Cationic Rearrangement Reactions
作者:Keiji Tanino、Yasuo Hatanaka、Isao Kuwajima
DOI:10.1246/cl.1987.385
日期:1987.2.5
In the reaction of 3-(trimethylsilyl)methylcyclohexyl mesylates with dimethylaluminium triflate, the silyl group has a remarkable effect to induce successive rearrangements of a hydride and an alkyl group so as to form a stable β-silyl cationic species which finally afford the corresponding olefins.
Titanium-catalyzed cascade carboalumination of 2-alkyl-substituted dienes and related trienes
作者:Denis Y. Kondakov、Shan Wang、Ei-ichi Negishi
DOI:10.1016/0040-4039(96)00693-4
日期:1996.5
The stereoselective “inter-intra” cascade carboalumination of dienes and trienes with Et2AlCl and Ti(OPr-i)4 provides a novel and stereoselective route to five- and six-membered rings including fused-, bridged-, and spiro-bicyclic structures with generation of quaternary carbon centers.