- Synthesis of unsymmetrical polysubstituted pyridines from β-sulfonylvinylamines via 1-aza-allyl anion intermediates
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A modular synthesis of highly functionalized unsymmetrical pyridines has been developed from reacting β-sulfonylvinylamines with α,β-unsaturated systems in the presence of base via the formation of 1-aza-allyl anion intermediates. Georg Thieme Verlag Stut
- Lau, Chan,Tsui, Gavin Chit,Lautens, Mark
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p. 3908 - 3914
(2012/01/11)
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- A new and convenient one-pot solid supported synthesis of 2,4,6-triarylpyridines
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A new, convenient, efficient and cost-effective one-pot solid supported synthesis of 2,4,6-triarylpyridines from benzylideneacetophenones and urea, thiourea or their derivatives, using Bi(III) nitrate-Al2O3 is described. The reaction seems to proceed via β-oxygenation of Bi(III)-enolized benzylideneacetophenone followed by Michael addition, heteroannulation with simultaneous retro aldol disproportionation and subsequent catalytic oxidation and dehydration.
- Kumar, Anil,Koul, Summon,Razdan, Tej K.,Kapoor, Kamal K.
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p. 837 - 842
(2007/10/03)
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- Synthesis of Some New 2,4,6-Triarylpyridines Using Phenacylidenedimethylsulfuranes
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Phenacylidenedimethylsulfurane and p-chlorophenacylidenedimethylsulfurane were reacted with α,β-unsaturated ketones in the presence of ammonium acetate in glacial acetic acid to give 2,4,6-triarylpyridines in 45-70percent yields.The structures of the pyri
- Gupta, Komal C.,Pathak, Pankaj K.,Saxena, Brijesh K.,Srivastava, Nirupma,Pandey, Kalpna
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p. 131 - 132
(2007/10/02)
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- Synthesis of Some New 2,4,6-Triarylpyridines Using Phenacylpyridinium Ylid
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Phenacylpyridinium ylid reacts with some substituted benzylidene-2-acetothiophenes, benzylidene-4-chloroacetophenones and benzylidene-3-nitroacetophenones in the presence of ammonium acetate in methanol or glacial acetic acid to give 2-phenyl-4-substituted-phenyl-6-(2-thienyl)pyridines (5a-e), 2-phenyl-4-substituted-phenyl-6-(4-chlorophenyl)pyridines (5f-j) and 2-phenyl-4-substituted-phenyl-6-(3-nitrophenyl)pyridines (5k-m), respectively in fair to good yields.
- Malik, Saroj,Tewari, R. S.,Srivastava, N.,Nigam, R. K.,Gupta, K. C.
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p. 242 - 243
(2007/10/02)
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- Studies on Cycloimmonium Ylids: Synthesis of Some 2,4,6-Triarylpyridines via Isoquinolinium Ylids
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Aroylmethylene-isoquinolinium ylids on reaction with substituted benzylidenacetophenones in gl. acetic acid containing ammonium acetate afford 2,4,6-triarylpyridines (4a-j).The reaction seems to proceed via the intermediacy of pentane-1,5-dionylisoquinoli
- Tewari, R. S.,Dubey, A. K.
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p. 153 - 154
(2007/10/02)
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