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Synlett 2009(3): 461-465
DOI: 10.1055/s-0028-1087532
DOI: 10.1055/s-0028-1087532
LETTER
© Georg Thieme Verlag
Stuttgart ˙ New York
Highly Diastereoselective Hydrogenation of Furan-2-carboxylic Acid Derivatives on Heterogeneous Catalysts
Further Information
Publication History
Received
1 October 2008
Publication Date:
21 January 2009 (online)


Abstract
The heterogeneously catalyzed diastereoselective hydrogenation of furan-2-carboxylic acid derivatives modified with chiral auxiliaries is described. Chiral auxiliaries, catalysts, solvents, and additives were optimized for the reaction. Finally, the hydrogenation of furan-2-yl-[(S)-2-(hydroxydiphenylmethyl)-pyrrolidin-1-yl]-methanone resulted in a high diastereoselectivity. Removal of the auxiliary gave the tetrahydrofuran-2-carboxylic acid in 95% ee.
Key words
heterogeneous catalysis - stereoselective hydrogenation - furans - heterocycle - chiral auxiliary