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Synlett 1994; 1994(12): 1034-1036
DOI: 10.1055/s-1994-23076
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Enantioselective Cyclopropane Synthesis. Stereodivergent Courses of the 1, 3-Elimination Reaction, Dependent on the Lewis Acid

Mario Paetow* , Martina Kotthaus, Matthias Grehl, Roland Fröhlich, Dieter Hoppe
  • *Institut für Organische Chemie der Universität Kiel, Olshausenstr. 40-60, D-24118 Kiel, Germany.
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Publication Date:
22 March 2002 (online)

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The enantiomerically enriched lithium/(-)-sparteine complex (S)-5 of the 1,3-dicarbamate 3 yields opposite enantiomers of optically active cyclopropane 6a when different Lewis acids are applied. The stereochemistry of the 1,3-elimination reaction was rigorously established.