Published April 13, 2017
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Five-component synthesis of dihydropyridines based on diketene
- 1. Department of Chemistry, Faculty of Physics &Chemistry Alzahra University, Vanak, Tehran, Iran.
Description
A novel five-component strategy involving commercially available diketene, primary amines, malononitrile and various benzaldehydes for the synthesis of densely functionalized 1,4-dihydropyridines in good yields was achieved. The reaction pathway involves a sequential ring-opening of diketene/enamine formation/Knoevenagel-condensation/Michael addition and 6-exo-tet cyclization, resulting in multiple bond-formation events including two C–C and three C–N bonds ultimately leading to the formation of the respective 1,4-dihydropyridines.
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