Cobalt-mediated synthesis of angular [4]phenylene: Structural characterization of a metal lacyclopentadiene(alkyne) intermediate and its thermal and photochemical conversion

被引：63

作者：

Dosa, PI

Whitener, GD

Vollhardt, KPC ^{[1
]}

Bond, AD

Teat, SJ

机构：

[1] Univ Calif Berkeley, Ctr New Direct Organ Synth, Dept Chem, Berkeley, CA 94720 USA

[2] Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA

[3] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England

[4] CLRC, Daresbury Lab, Warrington WA4 4AD, Cheshire, England

来源：

ORGANIC LETTERS | 2002年 / 4卷 / 12期

关键词：

D O I：

10.1021/ol025956o

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

[GRAPHIC] The first X-ray crystal structure of a mononuclear metallacyclopentadiene(alkyne) complex has been obtained. This type of metallacycle is believed to be the key intermediate in the cobalt-mediated [2 + 2 + 2]cycloaddition of alkynes. Thermal treatment leads to the generation of angular [4]phenylene, the X-ray structural details of which are described. Under photochemical conditions, the cobaltacycle isomerizes to a highly strained (cyclobutadieno)dibenzocyclooctatrienyne complex.

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页码：2075 / 2078

页数：4

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