New Synthesis of Pyrido[2,3-<i>d</i>] and [3,2-<i>d</i>]Oxazines
作者:Amin F. Fahmy、Jürgen Sauer、Mohamed Salah K.Youssef、Mohamed Said AbdelHalim、Mamdouh A. Hassan
DOI:10.1080/00397919808004864
日期:1998.8
Abstract N-Hydroxyquinolinimide 1 reacts with each of aromatic amines, hydrazine hydrate and aromatic hydrocarbons to give arylcarbamoyl pyridines 2, pyrrolopyridines 3, pyridopyridazines 4 and pyridooxazinones 5 and 6. The heterocycles 5 and 6 can be transformed to the condensed systems, triazolopyridopyridazines 14 and 15 through series of reactions.
SYNTHESIS OF ISOMERIC PYRIDOOXAZINONES, PYRIDOPYRIDAZINES AND TRIAZOLOPYRIDOPYRIDAZINES FROM<i>o</i>-AROYLPYRIDINECARBOXYLIC ACIDS
作者:Mohamed Salah K. Youssef、Amin F. Fahmy、Mohamed S. Abdel Halim、Mamdouh A. Hassan、Jürgen Sauer
DOI:10.1080/00304940509354954
日期:2005.6
investigation deals with the synthesis of isomeric pyridooxazine derivatives and some related compounds via an alternativenewroute using the acids 2 and 3. Thus, the reaction of quinolinic anhydride (1) with anhydrous AlCl, in benzene, toluene and chlorobenzene was repeated, and also carried out in anisole, to yield 2a-d in 61-71% yields. As reported previously, none of the corresponding 2-aroyl