NMR spectroscopy of organolithium compounds .19. reaction of (Z)-1,2-bis(trimethylsilyl)-1-phenylethene with lithium: Dianion formation, Schlenk dimerization, and C-13,Li-6 coupling in a benzyllithium system

被引：7

作者：

Bohler, B ^{[1
]}

Huls, D ^{[1
]}

Gunther, H ^{[1
]}

机构：

[1] UNIV GESAMTHSCH SIEGEN,FACHBEREICH 8 OC II,D-57068 SIEGEN,GERMANY

来源：

TETRAHEDRON LETTERS | 1996年 / 37卷 / 48期

关键词：

D O I：

10.1016/S0040-4039(96)02036-9

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Lithium reduction of (Z)-1,2-bis(trimethylsilyl)-1-phenylethene (1) yields the dianion of the (E)-isomer (3) and via Schlenk dimerization dilithium 1,4-diyl-1,4-diphenyl-1,2,3,4-tetrakis(trimethylsilyl)butane (4). The NMR parameters for both systems are reported and their solution structures are discussed. The formation of 4 is reversible and a unique feature of 4 is the scalar (1)J(C-13,Li-6) spin-spin coupling constant of 2.7 Hz for the C-Li bond, which is resolved even at room temperature. Copyright (C) 1996 Elsevier Science Ltd

引用

页码：8719 / 8722

页数：4

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