Synthesis of Trisubstituted-4H-Pyrans via Unexpected Cycloaddition of Aldehydes with Acetylenic Ketones Mediated by DMAP and 2,4- Pentanedione

Bin      Hu; Qing-Fa      Zhou; Kai      Tang; Song      Xue

doi:10.2174/157017809789869438

Abstract

A cycloaddition of aldehydes and acetylenic ketones mediated by 4-dimethylaminopyridine and 2,4- pentanedione is reported. The method supplies a facile way to synthesize 3,4,5-trisubstituted-4H-pyrans in moderate to good yields under mild conditions.

Keywords: Cycloaddition, acetylenic ketones, aldehydes, 4H-pyran, DMAP, 2,4-pentanedione

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Letters in Organic Chemistry

Title: Synthesis of Trisubstituted-4H-Pyrans via Unexpected Cycloaddition of Aldehydes with Acetylenic Ketones Mediated by DMAP and 2,4- Pentanedione

Volume: 6 Issue: 7

Author(s): Bin Hu, Qing-Fa Zhou, Kai Tang and Song Xue

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Keywords: Cycloaddition, acetylenic ketones, aldehydes, 4H-pyran, DMAP, 2,4-pentanedione

Abstract: A cycloaddition of aldehydes and acetylenic ketones mediated by 4-dimethylaminopyridine and 2,4- pentanedione is reported. The method supplies a facile way to synthesize 3,4,5-trisubstituted-4H-pyrans in moderate to good yields under mild conditions.

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Hu Bin, Zhou Qing-Fa, Tang Kai and Xue Song, Synthesis of Trisubstituted-4H-Pyrans via Unexpected Cycloaddition of Aldehydes with Acetylenic Ketones Mediated by DMAP and 2,4- Pentanedione, Letters in Organic Chemistry 2009; 6 (7) . https://dx.doi.org/10.2174/157017809789869438