Abstract

The efficiency of chiral Lewis acids derived from TiCl4 or Al(Bui)2Cl with chiral chelating ligands as catalysts for some enantioselective reactions was evaluated. The Diels-Alder reaction between isoprene and methyl acrylate gave the cyclohexene derivative with up to 32% enantiomeric excess (e. e.). The reaction of 3-methylbutanal with allyltrimethylsilane led to 6-methylhept-1-en-4-ol with up to 36% e. e.

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