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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 23, Number 5
BKCSDE 23(5)
May 20, 2002 

 
Title
Chiral C2-Symmetric a- and w-Diimines with Bulky Substituents at Nitrogen:Synthesis and Catalytic Properties of Some Copper Complexes
Author
Dong-Kyu Park, Eun-Sook Ryu, Seung Hwan Paek, Sang Chul Shim, Chan Sik Cho, Tae-Jeong Kim
Keywords
Chiral ferrocenes, Diimines, Copper catalyst, Cyclopropanation.
Abstract
Two new C2-symmetric chiral α- and w-Diimines incorporating bulky ferrocenylethylamine and their copper(I)complexes have been synthesized and characterized by analytical and various spectroscopic techniques. The catalytic activities of these complexes have been tested in the asymmetric cyclopropanation of a series of olefins with some diazoacetates to achieve varying degree of dia- and enantio-selectivities depending on the nature of the ligand, the substrates, and the reagents. Some mechanistic implication has been made with regard to the interactions among all these chemical species.
Page
721 - 726
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