CATALYSTS FOR METATHESIS REACTIONS INCLUDING ENANTIOSELECTIVE OLEFIN METATHESIS, AND RELATED METHODS
申请人:Malcolmson Steven J.
公开号:US20110065915A1
公开(公告)日:2011-03-17
The present invention provides compositions comprising metal complexes, and related methods. In some embodiments, metal complexes of the invention may be useful as catalysts for chemical reactions, including metathesis reactions, wherein the catalysts exhibit enhanced activity and stereoselectivity. In some embodiments, the invention may advantageously provide metal complexes comprising a stereogenic metal atom. Such metal complexes may be useful in enantioselective catalysis.
Ibrahem, Ismail; Yu, Miao; Schrock, Richard R., Journal of the American Chemical Society, 2009, vol. 131, p. 3844 - 3845
作者:Ibrahem, Ismail、Yu, Miao、Schrock, Richard R.、Hoveyda, Amir H.
DOI:——
日期:——
Comparison of Ru- and Mo-Based Chiral Olefin Metathesis Catalysts. Complementarity in Asymmetric Ring-Opening/Cross-Metathesis Reactions of Oxa- and Azabicycles
作者:G. Alex Cortez、Carl A. Baxter、Richard R. Schrock、Amir H. Hoveyda
DOI:10.1021/ol071008h
日期:2007.7.1
A comparative study of chiral Mo- and Ru-based catalysts to promote enantioselective synthesis of 2,6-disubstituted pyrans and piperidines through asymmetricring-opening/cross-metathesis (AROM/CM) reactions is presented. These studies demonstrate the critical complementarity that exists between the two classes of chiralcatalysts.
Efficient Enantioselective Synthesis of Functionalized Tetrahydropyrans by Ru-Catalyzed Asymmetric Ring-Opening Metathesis/Cross-Metathesis (AROM/CM)
作者:Dennis G. Gillingham、Osamu Kataoka、Steven B. Garber、Amir H. Hoveyda
DOI:10.1021/ja0458672
日期:2004.10.1
efficient method for enantioselectivesynthesis of highly functionalized pyrans (up to 98% ee) through Ru-catalyzed asymmetricring-opening metathesis/cross-metathesis is described. Reactions are promoted by a recyclable chiral Ru-chloride or a new chiral Ru-iodide complex; the latter catalyst is less efficient but gives rise to significantly higher levels of enantioselectivity. Catalytic reactions can be