485819-22-5Relevant academic research and scientific papers
2,6-diaryl-4,4-disubstituted 1,4-dihydropyridines: Source for spiro heterocycles
Padmavathi,Balaiah,Reddy, T. V. Ramana,Reddy, B. Jagan Mohan,Reddy, D. Bhaskar
, p. 513 - 517 (2003)
Novel spiro heterocycles (5-12) were obtained by the cyclocondensation of 2,6-diaryl-4,4-dimethoxycarbonyl-/4-cyano-4-ethoxycarbonyl-1,4-dihydropyridines (3/4) with hydrazine hydrate, hydroxylamine hydrochloride, urea, and thiourea. All the compounds were
2,6-Diaryl-4,4-disubstituted-4H-thiopyran: Source for spiro heterocycles
Padmavathi, Venkatapuram,Balaiah, Akula,Bhaskar Reddy, Dandu
, p. 649 - 653 (2007/10/03)
The 1,5-diaryl-3,3-disubstituted-1,5-pentanedione on reaction with ammonium acetate, phosphorus pentoxide and phosphorus pentasulfide gave respective 1,4-dihydropyridine, 4H-pyran and 4H-thiopyran. Novel spiro heterocycles have been obtained by the cyclocondensation of 4H-thiopyran with hydrazine, hydroxylamine, urea and thiourea.
