Copper-Catalyzed Enantioselective Conjugate Addition of Grignard Reagents to Acyclic Enones
作者:Fernando López、Syuzanna R. Harutyunyan、Adriaan J. Minnaard、Ben L. Feringa
DOI:10.1021/ja046632t
日期:2004.10.1
A highly enantioselective Cu-catalyzed addition of Grignard reagents to acyclic aliphatic enones is described. In the presence of 5 mol % of CuBr.SMe2 and 6 mol % of JosiPhos diphosphine aliphatic enones react with Grignard reagents to provide beta-substituted linear ketones with high yields, regio-, and enantioselectivities.
The present invention provides a process for the oxidation of straight-chain, branched-chain or cyclic alkanes of 1-20 carbon atoms and benzene derivatives represented by the following formulas (1) - (2). The alcohols and ketones obtained by the oxidation of the alkanes mentioned above and those by the oxidation of the benzene derivatives mentioned above represented by the following formulas (3) - (6) are important as basic starting materials in producing various chemical products including resins, such as nylon and polyester, pharmaceuticals, agricultural chemicals, perfumes, dyes, etc.