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Synlett 1993; 1993(11): 837-838
DOI: 10.1055/s-1993-22625
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(E)-Selective Alkylidenation of Aldehydes with Reagents derived from α-Acetoxy bromides, Zinc and CrCI3

Manfred Knecht* , Wilhelm Boland
  • *Institut für Organische Chemie der Universität Karlsruhe, Richard-Willstätter-Allee 2, D-76128 Karlsruhe, Germany
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Publication Date:
19 March 2002 (online)

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Reagents, prepared from the α-acetoxy bromides 2a-d, zinc dust and CrCl3 in THF in the presence of a donor ligand like dimethylformamide, give selectively (E)-alkenes 3a-j upon reaction with aldehydes 1a-f.