Rhodium-Catalyzed Enantioselective Desymmetrization of <i>meso</i>-3,5-Dimethyl Glutaric Anhydride: A General Strategy to <i>syn</i>-Deoxypolypropionate Synthons
作者:Matthew J. Cook、Tomislav Rovis
DOI:10.1021/ja073269s
日期:2007.8.1
A rhodium phosphinooxazoline system allows for an efficient enantioselectivedesymmetrization of dimethyl glutaric anhydride. Both commercially available and in situ generated sp3-organozinc nucleophiles couple efficiently in high enantiomeric excess. This chemistry has also been extended to other 3,5-disubstituted anhydrides, and further elaboration has enabled the synthesis of potentially useful
Ligand differentiated complementary Rh-catalyst systems for the enantioselective desymmetrization of meso-cyclic anhydrides
作者:Jeffrey B. Johnson、Matthew J. Cook、Tomislav Rovis
DOI:10.1016/j.tet.2008.10.075
日期:2009.4
Two distinct systems for the rhodium-catalyzed enantioselective desymmetrization of meso-cyclic anhydrides have been developed. Each system has been optimized and are compatible with the use of in situ prepared organozinc reagents. Rhodium/PHOX species efficiently catalyze the addition of alkyi nucleophiles to glutaric anhydrides, while system is effective in the enantioselective arylation of succinic and glutaric anhydrides. (C) 2008 Elsevier Ltd. All rights reserved.
Highly Efficient Nickel-Catalyzed Cross-Coupling of Succinic and Glutaric Anhydrides with Organozinc Reagents
作者:Eric A. Bercot、Tomislav Rovis
DOI:10.1021/ja044588b
日期:2005.1.1
introduction of molecular complexity through the use of functionalized coupling partners. Regioselective alkylation of an unsymmetrical succinic anhydride and a profound effect of pendent coordinating olefins on reaction rate suggest a mechanism involving discrete oxidative addition of the nickel complex into the cyclicanhydride followed by a transmetalation event.