3-Carboxamides and 3-carboxanilides of 6-alkyl and 6-aryldihydropyridin-2(1H)-ones have been prepared via different reaction pathways. All synthesized amides show hydrogen bonds in their NMR spectra. The 4-hydroxy compounds were obtained as a mixture of tautomers. Their configurations were elucidated by NMR experiments.
Synthesis of Isomeric Isoxazolopyridinones
作者:Robert Weis、Klaus Schweiger、Walter M. F. Fabian
DOI:10.1007/pl00010140
日期:1998.12
Reaction of 4-methylamino-5,6-dihydropyridinone with acetyl chloride yielded exclusively the 3-acetyl derivative. When the methylamino group of the latter was removed by alkaline hydrolysis, a mixture of two hydroxy derivatives was formed. Those cyclized upon treatment with hydroxylamine exclusively to the isoxazolo[4,5-c]pyridinone, whereas the 4-methylamino analogue yielded, depending on pH, mainly the isoxazolo[4,3-c]pyridinone or the isoxazolo[4,5-c]pyridinone. The configurations of the latter compounds were established by NMR experiments.
ZIGEUNER G.; SCHWEIGER K.; FUCHSGRUBER A., MONATSH. CHEM., 1981, 112, NO 2, 187-197
作者:ZIGEUNER G.、 SCHWEIGER K.、 FUCHSGRUBER A.
DOI:——
日期:——
NIETSCH, K. -H.;TROSCHUETZ, R.;ROTH, H. J., ARCH. PHARM., 1985, 318, N 2, 175-177
作者:NIETSCH, K. -H.、TROSCHUETZ, R.、ROTH, H. J.
DOI:——
日期:——
�ber das 4-Hydroxy-6,6-dimethyl-5,6-dihydro-2(1H)-pyridinthion bzw.-on und die entsprechenden Tautomeren