1,3-bis(N,N-dialkylamino)imidazolin-2-ylidenes:: Synthesis and reactivity of a new family of stable N-heterocyclic carbenes

被引：62

作者：

Alcarazo, M

Roseblade, SJ

Alonso, E

Fernández, R

Alvarez, E

Lahoz, FJ

Lassaletta, JM

机构：

[1] US, CSIC, Inst Invest Quim, E-41092 Seville, Spain

[2] Univ Seville, Dept Quim Organ, E-41012 Seville, Spain

[3] CSIC, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2004年 / 126卷 / 41期

关键词：

D O I：

10.1021/ja0471119

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The synthesis of stable 1,3-bis(N,N-dialkylamino)imidazolin-2-ylidenes was accomplished from readily available chiral bis-hydrazones after reduction or addition of PhMgCl, cyclization to imidazolinium salts, and treatment with KN(SiMe3)2. This strategy allows the obtention of free imidazolin-2-ylidenes and their Rh(COD)Cl complexes in enantiomerically pure form. The σ-donor ability of dialkylamino-substituted diaminocarbenes was found to be slightly higher than that of alkyl(aryl) analogues. Copyright © 2004 American Chemical Society.

引用

页码：13242 / 13243

页数：2

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