Pyridine derivatives R 0380A Facile Synthesis of 2,3-Disubstituted-6-arylpyridines from Enaminones Using Montmorillonite K10 as Solid Acid Support. -The cyclocondensation of enaminoketones with 1,3-dicarbonyl compounds in the presence of ammonium acetate is efficiently promoted by montmorillonite K10 clay. -(REDDY*, G. J.; LATHA, D.; THIRUPATHAIAH, C.; RAO, K. S.; Tetrahedron Lett. 46 (2005) 2, 301-302; R&D Lab., Dr. Jagath Reddy's Heterocyclics, S. V. Co-op Ind. Estate, Hyderabad 500 037, India; Eng.) -Mais 18-129
A series of new 4-pyrazolyl/benzopyrano[4,3-6]pyridinyl/pyrazolo[l,5a]pyrimidinyl-3-cyanocoumarins (5, 6 & 7) have been synthesized starting from 3formylchromones (1).
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