Chemistry - A European Journal p. 4986 - 4990 (2010)
Update date:2022-09-26
Topics:
Ito, Jun-Ichi
Ujiie, Satoshi
Nishiyama, Hisao
chemical equation presantation Good to excellent enantioselectivities (up to 99 % ee) of trans-cyclopropane derivatives were achieved in the cyclopropanation of alkenes with tert-buty1 α-diazoacetate by using 0.5 mol % of a mononuclear chiral ruthenium aqua complex containing the chiral bis(oxazolinyl)phenyl ligand, which was obtained via C-H activation by RuCl 3·3H2O in the presence of Mg and cyclooctadiene (cod). Intramolecular cyclopropanation reactions using the new Ru complex also proceed with high yields and excellent enantioselectivities.
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