Alkyne-coupling reactions catalyzed by OsHCl(CO)(PiPr3)2 in the presence of diethylamine

被引：79

作者：

Esteruelas, MA ^{[1
]}

Herrero, J

López, AM

Oliván, M

机构：

[1] Univ Zaragoza, CSIC, Dept Quim Inorgan, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain

[2] Univ Cantabria, Dept Quim, E-39005 Santander, Spain

来源：

ORGANOMETALLICS | 2001年 / 20卷 / 14期

关键词：

D O I：

10.1021/om010178+

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Complex OsHCl(CO)((PPr3)-Pr-i)(2), in the presence of diethylamine, catalyzes the dimerization of terminal alkynes HC=CR (R = Me3C, Cy, Ph, and Me3Si). The reactions initially give butatrienes RCH=C=C=CHR, which are stable under the reaction conditions for R = Me3C and Cy. For R = Ph, the butatrienes polymerize to -[CH(Ph)C drop CCH(Ph)](n)-, while for R = Me3Si, the butatriene isomerizes into the enyne Z-Me3SiCH=CH-C drop CSiMe3. The formation of butatrienes takes place via butenynyl intermediates of the type Os(C drop CR){eta (3)-C(C drop CR)=CHR}(CO) ((PPr3)-Pr-i)(2).

引用

页码：3202 / 3205

页数：4

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