Nucleophilic displacement of N-aryl and heteroaryl groups. Part 5. Conversion of 2-aminopyridines into 2-pyridones
作者:Alan R. Katritzky、Radi Awartani
DOI:10.1039/p19830002623
日期:——
2-Ethoxycarbonyl-1-(2-pyridyl)pyridinium cations (3)(easily prepared from 2-aminopyridine and the appropriate pyrylium salt) are converted by dilute NaOH at 25 °C into 1-(substituted 2-pyridylcarbonyl)-2-pyridones (7). Compounds (7) are readily hydrolysed to 2-pyridones.
The Conversion of Pyridinium-2-carboxylates into 2-Thioxo-1,2-dihydropyridines (Pyridine-2-thiones)
作者:Alan R. Katritzky、Hassan M. Faid-Allah
DOI:10.1055/s-1983-30261
日期:——
KATRITZKY, A. R.;AGHA, B. J.;AWARTANI, R.;PATEL, R. C., J. CHEM. SOC. PERKIN TRANS., 1983, N 11, 2617-2621
作者:KATRITZKY, A. R.、AGHA, B. J.、AWARTANI, R.、PATEL, R. C.
DOI:——
日期:——
KATRITZKY A. R.; AWARTANI RADI; ALLAH HASSAN FAID; AGHA BUSHRA J.; PALENI+, HETEROCYCLES, 24,(1986) N 2, 387-392
作者:KATRITZKY A. R.、 AWARTANI RADI、 ALLAH HASSAN FAID、 AGHA BUSHRA J.、 PALENI+
DOI:——
日期:——
Nucleophilic displacements of N-aryl and heteroaryl groups. Part 4. Pyrylium-mediated transformations of heteroarylamines into pyridinium salts and their inter- and intra-molecular displacement
作者:Alan R. Katritzky、Bushra J. Agha、Radi Awartani、Ranjan C. Patel
DOI:10.1039/p19830002617
日期:——
idinium salts. Hydrolysis and decarboxylation afford 1-(2-pyridyl)-2,4-diphenyl- and 1-(2-pyridyl)-4-phenyl-pyridinium salts. Neither these, nor their 2,4,6-triphenyl analogues underwent smooth nucleophilic substitution.