Benzo[b]fluorenes formed in the thermal cyclization of 3-ene-1,6-diynes

被引：31

作者：

Schmittel, M

Strittmatter, M

Schenk, WA

Hagel, M

机构：

[1] Univ Wurzburg, Inst Organ Chem, D-97074 Wurzburg, Germany

[2] Univ Wurzburg, Inst Anorgan Chem, D-97074 Wurzburg, Germany

来源：

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES | 1998年 / 53卷 / 09期

关键词：

enediyne; cyclization; fluorene; X-ray data; biradical;

D O I：

10.1515/znb-1998-0913

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A three-step preparation of the benzofluorene core is presented. The last step involves thermal cyclization of 3-ene-1,6-diyne (7) leading to the formation of four benzofluorene derivatives, one of which has been investigated by X-ray analysis. The harsh thermal conditions indicate that the cyclization of 7 might not proceed via a biradical intermediate as would be anticipated by a mechanistic proposal from Ueda.

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收藏

页码：1015 / 1020

页数：6

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