Tetrahedron Letters p. 837 - 842 (2006)
Update date:2022-08-04
Topics:
Kumar, Anil
Koul, Summon
Razdan, Tej K.
Kapoor, Kamal K.
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.
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