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Synfacts 2010(1): 0065-0065
DOI: 10.1055/s-0029-1218509
DOI: 10.1055/s-0029-1218509
Metal-Catalyzed Asymmetric Synthesis and Stereoselective Reactions
© Georg Thieme Verlag
Stuttgart ˙ New York
Asymmetric Stereoablative Alkylation of 3-Halooxindoles
S. Ma, X. Han, S. Krishan, S. C. Virgil, B. M. Stoltz*
California Institute of Technology, Pasadena, and Beckman Research Institute at City of Hope, Duarte, USA
Further Information
Publication History
Publication Date:
21 December 2009 (online)
Significance
The 3,3-disubstituted oxindole moiety is prevalent in a variety of biologically active molecules. In most enantioselective methods for the construction of this motif, the oxindole unit functions as nucleophile. In the present report, oxindole serves as an electrophile for the coupling with malonate nucleophiles. Racemic 3-bromo- or 3-chlorooxindoles containing alkyl/alkyl ether or aromatic substituents at the 3-position are alkylated in a stereoablative process in high ee.