69. New syntheses of heterocyclic compounds. Part XV. 9 : 10-Dihydro-10-keto-1 : 3-dimethyl-2-aza-9-oxaphenanthrenes
作者:A. Courts、V. Petrow
DOI:10.1039/jr9520000334
日期:——
Cyanopyridines. Synthesis and Recyclization of Their Quaternary Salts
作者:G. P. Sagitullina、L. V. Glizdinskaya、S. I. Oleinikova、E. G. Atavin、R. S. Sagitullin
DOI:10.1007/s11178-005-0348-y
日期:2005.9
3-Cyanopyridines containing an acetyl, ester, nitro, or cyano group in the 5-position were synthesized via various versions of the Hantzsch reaction. Recyclization of quaternary pyridinium salts by the action of aqueous-alcoholic alkali afforded 2-methylaminopyridine derivatives and 6-methylamino-3-nitro-2,4-diphenylbenzonitrile.