1.
Acta Crystallogr C
; 64(Pt 4): m147-8, 2008 Apr.
Article
in English
| MEDLINE
| ID: mdl-18391373
ABSTRACT
The tricarbonylchromium unit bound to the arene ring of the chiral title complex, [Cr(C(19)H(26)O(3))(CO)(3)], is rotated by ca 25 degrees in agreement with the proposed mechanism for 1,5-asymmetric induction of nucleophilic attack.
Subject(s)
Bridged Bicyclo Compounds/chemistry , Chromium Compounds/chemistry , Crystallography, X-Ray , Models, Molecular , Molecular Structure
2.
Org Lett
; 6(13): 2121-4, 2004 Jun 24.
Article
in English
| MEDLINE
| ID: mdl-15200300
ABSTRACT
[reaction: see text] Vicinal stereocontrol during nucleophilic addition of tert-butyl lithiopropionate to eta(6)-anisole chromium tricarbonyl complexes with differing para substituents has been studied. Excellent vicinal double stereoinduction (>99:1) was observed when the para substituent was Si(CH(3))(3), and this has been applied to a stereoselective formal synthesis of (+/-)-erythro Juvabione. Asymmetric synthesis by chiral auxiliary directed nucleophilic addition is also discussed.