Olefin cyclopropanation catalysed by half-sandwich ruthenium complexes

被引：40
作者：
Tutusaus, O
Delfosse, S
Demonceau, A
Noels, AF
Núñez, R
Viñas, C
Teixidor, F
机构：
[1] Univ Liege, Macromol Chem & Organ Catalysis Lab, B-4000 Liege, Belgium
[2] CSIC, Inst Ciencia Mat Barcelona, E-08193 Barcelona, Spain
来源：
TETRAHEDRON LETTERS | 2002年 / 43卷 / 06期
关键词：
cyclopropanation; diazo compounds; metathesis; olefins; ruthenium and compounds;
D O I：
10.1016/S0040-4039(01)02292-4
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
Ruthenium complexes of the type [RuX(Cp')(PPh3)(2)] (X=Cl and H: Cp'=Cp, Cp*, indenyl, and carboranyl) efficiently catalyse olefin cyclopropa nation with diazoesters. and the cis/trans stereoselectivity of the resulting cyclopropanes strongly depends on the Cp' ligand. With [RuCl(Cp*)(PAr3)(2)] complexes, cyclopropanation competes with the formal carbene insertion into C-H vinyl bonds of styrene, whereas ring-opening metathesis polymerisation takes place with norbornene, lending support to the formation of ruthenium-carbene and ruthenacyclobutanes as intermediates in these reactions. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：983 / 987
页数：5
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