Facile 1,2-Migration of a Methyl Group on a {Dimethoxy(methyl)silyl}tungsten Complex: Formation of a Base-Stabilized (Dimethoxysilylene)(methyl) Complex

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• 作者：Eiji Suzuki ; Takashi Komuro ; Yuto Kanno ; Masaaki Okazaki ; Hiromi Tobita
• 刊名：Organometallics
• 出版年：2010
• 出版时间：November 8, 2010
• 年：2010
• 卷：29
• 期：21
• 页码：5296-5300
• 全文大小：786K
• 年卷期：v.29,no.21(November 8, 2010)
• ISSN：1520-6041

文摘

Reactions of Cp*(CO)₂W(DMAP)Me [1, Cp* = η⁵-C₅Me₅, DMAP = 4-(dimethylamino)pyridine] with trialkylsilanes HSiR₂Et (R = Me, Et) afforded (DMAP)(trialkylsilyl)tungsten complexes Cp*(CO)₂W(DMAP)(SiR₂Et) (2a, R = Me; 2b, R = Et). On the other hand, a reaction of 1 with dimethoxy(methyl)silane, HSi(OMe)₂Me, gave a DMAP-stabilized (dimethoxysilylene)tungsten complex, cis-Cp*(CO)₂W(Me){═Si(OMe)₂·DMAP} (cis-3), through 1,2-migration of a methyl group from silicon to tungsten. Silylene complex cis-3 isomerized to its trans-isomer trans-3.