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Synlett 2005(15): 2333-2334
DOI: 10.1055/s-2005-872267
DOI: 10.1055/s-2005-872267
LETTER
© Georg Thieme Verlag Stuttgart · New York
A Metal-Free Catalytic Aerobic Aromatization of Hantzsch 1,4-Dihydropyridines by N-Hydroxyphthalimide
Further Information
Publication History
Received
12 June 2005
Publication Date:
03 August 2005 (online)


Abstract
4-Alkyl- and 4-aryl-Hantzsch 1,4-dihydropyridines were oxidized to the corresponding pyridine derivatives in excellent yields by molecular oxygen using N-hydroxyphthalimide (NHPI) as the catalyst.
Key words
Hantzsch 1,4-dihydropiridines - aromatization - N-hydroxyphthalimide - molecular oxygen