SILICON-CARBON UNSATURATED-COMPOUNDS .54. NICKEL-CATALYZED REACTIONS OF 3,4-BENZO-1,1,2,2-TETRAETHYL-1,2-DISILACYCLOBUT-3-ENE WITH ALKYNES

被引：48

作者：

NAKA, A ^{[1
]}

OKAZAKI, S ^{[1
]}

HAYASHI, M ^{[1
]}

ISHIKAWA, M ^{[1
]}

机构：

[1] HIROSHIMA UNIV,FAC ENGN,DEPT APPL CHEM,HIGASHIHIROSHIMA 739,JAPAN

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 1995年 / 499卷 / 1-2期

关键词：

SILICON; TRANSITION METALS; O-QUINODISILANE; NICKEL;

D O I：

10.1016/0022-328X(95)00329-O

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The nickel-catalyzed reactions of 3,4-benzo-1,1,2,2-tetraethyl-1,2-disilacyclobut-3-ene (1) with disubstituted acetylenes have been investigated. Treatment of 1 with 3-hexyne and diphenylacetylene at 150 degrees C gave two types of adducts: 5,6-benzo-1,4-disilacyclohexa-2,5-dienes and 5,6-benzo-1,2-disilacyclohexa-3,5-dienes. With methylphenylacetylene, 1 afforded a 5,6-benzo-1,4-disilacyclohexa-2,5-diene and 5,6-benzo-1,2-disilacyclohexa-3,5-diene, together with a small amount of the other isomer. The reaction of 1 with phenyl(trimethylsilyl)acetylene produced 5,6-benzo-1,1,4,4-tetraethyl-3-phenyl-2-trimethylsilyl-1,4-disilacyclohexa-2,5-diene and 4,5-benzo-1,1,3,3-tetraethyl-2-[phenyl(trimethylsilyl)methylene]-1,3-disilacyclopent-4-ene (10). Similar reaction of 1 with 1-(trimethylsilyl)hexyne also afforded 5,6-benzo-3-butyl-1,1,4,4-tetraethyl-2-trimethylsilyl-1,4-disilacyclohexa-2,5-diene and 4,5-benzo-2-[butyl(trimethylsilyl)methylene]-1,1,3,3-tetraethyl-1,3-disilacyclopent-4-ene (12). A vinylidene carbene-nickel complex is proposed for the formation of 10 and 12, as a key intermediate.

引用

页码：35 / 41

页数：7

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