Pentaphenylcyclopentadienyl ruthenium complexes (3) are excellent catalysts for the racemization of secondary alcohols at ambient temperature. The combination of this process with enzymatic resolution of the alcohols results in a highly efficient synthesis of enantiomericallypure acetates at room temperature with short reaction times for most substrates. This new reaction was applied to a wide range
Dynamic Kinetic Resolution of a Wide Range of Secondary Alcohols: Cooperation of Dicarbonylchlorido(pentabenzylcyclopentadienyl)ruthenium and CAL-B
作者:Mari Päiviö、Denys Mavrynsky、Reko Leino、Liisa T. Kanerva
DOI:10.1002/ejoc.201001703
日期:2011.3
The substrate scope in the dynamickineticresolution of secondary alcohols was studied by using 31 structurally different alcohols and isopropenyl acetate in the presence of dicarbonylchlorido(pentabenzylcyclopentadienyl)ruthenium and Candida antarctica lipase B (Novozym435, CAL-B) in toluene. The enzyme and the rutheniumcomplex were shown to function in a highly compatible manner allowing the conversion