INHIBITION OF THE [2+2+2] CYCLIZATION BY THE FORMATION OF CHELATES - ALKYNE AND VINYLIDENE COMPLEXES WITH CYCLOPENTADIENYLCOBALT(I)

被引：43

作者：

BUTENSCHON, H ^{[1
]}

KETTENBACH, RT ^{[1
]}

KRUGER, C ^{[1
]}

机构：

[1] MAX PLANCK INST COAL RES,W-4330 MULHEIM,GERMANY

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH | 1992年 / 31卷 / 08期

关键词：

D O I：

10.1002/anie.199210661

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The trimerization of alkynes to arenes usually observed in the reaction of cyclopentadienylcobalt(I) complexes with alkynes could be prevented by chelation of the metal center with a "phosphane arm" on the cyclopentadienyl ligand. Instead alkyne complexes were obtained in very good yields. The reaction with ethyne leads to the vinylidene complex 1 (88% yield), a possible precursor to the carbene-cobalt complex.

引用

页码：1066 / 1068

页数：3

共 15 条

[11] Kolle U., 1982, ANGEW CHEM, V94, P132
[12] TRANSITION-METAL-MEDIATED CYCLO-ADDITION REACTIONS OF ALKYNES IN ORGANIC-SYNTHESIS
SCHORE, NE
[J]. CHEMICAL REVIEWS, 1988, 88 (07) : 1081 - 1119
[13] TASI M, 1988, ORGANOMETALLIC SYNTH, V4, P262
[14] Vollhardt K. P. C., 1984, ANGEW CHEM, V96, P525, DOI 10.1002/ange.19840960804
[15] COBALT-MEDIATED [2+2+2]-CYCLOADDITIONS - A MATURING SYNTHETIC STRATEGY
VOLLHARDT, KPC
[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 1984, 23 (08): : 539 - 556

← 1 2 →