ENANTIOMERICALLY PURE C-2-SYMMETRICAL BRIDGED FERROCENE AND TITANOCENE DERIVATIVES

被引：26

作者：

GIBIS, KL

HELMCHEN, G

HUTTNER, G

ZSOLNAI, L

机构：

[1] UNIV HEIDELBERG,INST ORGAN CHEM,IM NEUENHEIMER FELD 270,W-6900 HEIDELBERG,GERMANY

[2] UNIV HEIDELBERG,INST ANORGAN CHEM,W-6900 HEIDELBERG,GERMANY

来源：

JOURNAL OF ORGANOMETALLIC CHEMISTRY | 1993年 / 445卷 / 1-2期

关键词：

D O I：

10.1016/0022-328X(93)80205-P

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The chiral ansa metallocenes trans-(11R,12R)-bis-(eta5-cyclopentadienylmethyl)-dibenzobicyclo-[2.2.2]octano-iron(II) (6) and trans-(11R,12R)-bis-(eta5-cyclopentadienylmethyl)dibenzobicyclo-[2.2.2]-octano-titanium(IV) dichloride (8) have been prepared from the dilithium salt of trans-(11R,12R)-bis-(cyclopentadienyl-methyl)-9,10-dihydro-9,to-ethanoanthracene (4) by reaction with FeCl2 and TiCl4, respectively. Oxidation of the ferrocene derivative (6) with NOBF4 gave trans-(11R, 12R)-bis-(eta5-cyclopentadienylmethyl)-dibenzo-bicyclo-[2.2.2]octano-iron(III) tetrafluoroborate (7) which catalyzes the Diels-Alder reaction of methacrylaldehyde with cyclopentadiene giving high diastereo- but modest enantio-selectivity.

引用

页码：181 / 186

页数：6

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