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Bài 1:

Highly enantioselective and cis-diastereoselective cyclopropanation of olefins catalyzed by ruthenium complexes of (iminophosphoranyl)ferrocenes

Tetrahedron Letters 48 (2007) 8014–8017

Vo D. M. Hoang, Pattubala A. N. Reddy and Tae-Jeong Kim

Abstract—Chiral (iminophosphoranyl)ferrocenes (1 and 2) are highly efficient ligands to achieve high diastereoselectivity (up to 95/5 dr in favor of the cis-isomer) as well as enantioselectivity (up to 99% ee) in Ru-catalyzed asymmetric cyclopropanation of various
olefins. Reversal in diastereoselectivity is found as a function of metal-to-ligand ratio in the reaction of styrene.

Bai 2:


Asymmetric Allylic Oxidation Catalyzed by Copper(I) Complexes of Chiral (Iminophosphoranyl)ferrocenes

Organometallics 2008, 27, 1026–1027

Vo D. M. Hoang, Pattubala A. N. Reddy, and Tae-Jeong Kim

Summary: The chiral (iminophosphoranyl)ferrocenes 1-3 are highly Versatile ligands in Cu-catalyzed asymmetric allylic oxidation of a series of cyclic olefins with tert-butyl perbenzoate, achieVing almost complete enantioselectiVity (up to 99% ee) in a reasonably short period of time (36 h).

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