CATALYTIC ASYMMETRIC CARBOMAGNESIATION OF UNACTIVATED ALKENES - A NEW, EFFECTIVE, ACTIVE, CHEAP AND RECOVERABLE CHIRAL ZIRCONOCENE

Authors
BELL L WHITBY RJ JONES RVH STANDEN MCH
Citation
L. Bell et al., CATALYTIC ASYMMETRIC CARBOMAGNESIATION OF UNACTIVATED ALKENES - A NEW, EFFECTIVE, ACTIVE, CHEAP AND RECOVERABLE CHIRAL ZIRCONOCENE, Tetrahedron letters, 37(39), 1996, pp. 7139-7142
Citations number
38
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Tetrahedron letters → ACNP
ISSN journal
00404039
Volume
37
Issue
39
Year of publication
1996
Pages
7139 - 7142
Database
ISI
SICI code
0040-4039(1996)37:39<7139:CACOUA>2.0.ZU;2-Z
Abstract
The ethylmagnesiation of terminal alkenes catalysed by ylene-1,2-bis(e ta(5)-4,5,6,7-tetrahydro-1-indenyl) zirconium (R)-1,1'-binaphth-2,2'-d iolate gave low turnovers and enantioexcesses. A novel C-i symmetric z irconocene dichloride CpCp'ZrCl2 (Cp = C5H5, CP' = 1-neomenthyl-4,5,6, 7-tetrahydroindenyl) was prepared which gave better enantioselectivity , is cheaper to make, catalytically more active, and recoverable. Copy right (C) 1996 Elsevier Science Ltd