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CCDC-621781 (4ac) and CCDC-621782 (4af) contain the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data_request/cif.
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CCDC-621781 (4ac) and CCDC-621782 (4af) contain the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data_request/cif.
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For recent reviews on the catalytic enantioselective construction of quaternary chiral with only carbon-centered substituents, see: a J. Christoffers, A. Baro, Adv. Synth. Catal. 2005, 347, 1473;
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66
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33846458115
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The relative configuration of 6 was assigned by extensive NMR spectroscopic analysis; see Supporting Information.
-
The relative configuration of 6 was assigned by extensive NMR spectroscopic analysis; see Supporting Information.
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