Enantioselective synthesis of ansa-zirconocenes

被引：30

作者：

LoCoco, MD ^{[1
]}

Jordan, RF ^{[1
]}

机构：

[1] Univ Chicago, Dept Chem, Chicago, IL 60637 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2004年 / 126卷 / 43期

关键词：

D O I：

10.1021/ja045245g

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The reaction of the chiral chelated bis-amide complex Zr{(2R,4R)-PhNCHMeCH2CHMeNPh}Cl2(THF)2 (R,R-7) with lithium ansa-bis-indenyl reagents Li2[SBI](Et2O) (8a, SBI = (1-indenyl)2SiMe2) or Li2[EBI](Et2O) (8b, EBI = 1,2-(1-indenyl)2ethane) in THF affords the corresponding ansa-zirconocenes S,S-(SBI)Zr{(2R,4R)-PhNCHMeCH2CHMeNPh} (S,S,R,R-9a) or S,S-(EBI)Zr{(2R,4R)-PhNCHMeCH2CHMeNPh} (S,S,R,R-9b) in >95% isolated yield and >99% enantiomeric excess. Compound 9b was converted to the corresponding enantiomerically pure dichloride S,S-(EBI)ZrCl2 (S,S-10b) in 91% isolated yield by reaction with HCl in Et2O. The chiral diamine (2R,4R)-HPhNCHMeCH2CHMeNHPh (R,R-5) was recovered from this reaction. Copyright © 2004 American Chemical Society.

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页码：13918 / 13919

页数：2

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