Chiral-at-metal ruthenium(II) complexes as catalysts in the asymmetric cyclopropanation reaction
摘要:
A family of five- and six-coordinate chiral-at-metal ruthenium complexes has been examined as catalysts in the asymmetric cyclopropanation reaction of styrene with ethyl diazoacetate. With complexes 5 and 6, good cis-diastereoselectivity and enantioselectivity up to 74 % were observed. (c) 2005 Elsevier B.V All rights reserved.
(oxazolinylferrocenyl)phosphines, RuCl2(PPh3)((oxazolinylferrocenyl)phosphine), have been prepared and characterized by spectroscopy. These ruthenium complexes are very effective catalysts for asymmetrichydrosilylation of not only ketones but also an imine to give the corresponding sec-alcohols (up to 97% ee) and a sec-amine (88% ee) after acid hydrolysis, respectively.
Chiral-at-metal ruthenium(II) complexes as catalysts in the asymmetric cyclopropanation reaction
作者:Marta Lasa、Pilar López、Carlos Cativiela、Daniel Carmona、Luis A. Oro
DOI:10.1016/j.molcata.2005.02.030
日期:2005.6
A family of five- and six-coordinate chiral-at-metal ruthenium complexes has been examined as catalysts in the asymmetric cyclopropanation reaction of styrene with ethyl diazoacetate. With complexes 5 and 6, good cis-diastereoselectivity and enantioselectivity up to 74 % were observed. (c) 2005 Elsevier B.V All rights reserved.