. Bulletin international de l'Académie des Sciences de Cracovie. Classe des sciences mathématiques et naturelles. = Anzeiger der Akadémie der Wissenschaften in Krakau. Mathematisch-naturwissenschaftliche classe. Science. 246. C = N- 1 1 N CO. CH, Cl / \ —c = N- 1 ^H o'h N— CO. eu. ^Cl /\_ NH -C = N-/'\ C = N-1 'ci OH CO. CH, The formation of the second chloroindophenazine in this re- action, foreseen by theory. we did not establish with certainty. We succeeded however in obtaining this second isomere in the following manner. Similarly as ail o-amino-phenyl-hydroxvchinoxalines hi- therto examin
. Bulletin international de l'Académie des Sciences de Cracovie. Classe des sciences mathématiques et naturelles. = Anzeiger der Akadémie der Wissenschaften in Krakau. Mathematisch-naturwissenschaftliche classe. Science. 246. C = N- 1 1 N CO. CH, Cl / \ —c = N- 1 ^H o'h N— CO. eu. ^Cl /\_ NH -C = N-/'\ C = N-1 'ci OH CO. CH, The formation of the second chloroindophenazine in this re- action, foreseen by theory. we did not establish with certainty. We succeeded however in obtaining this second isomere in the following manner. Similarly as ail o-amino-phenyl-hydroxvchinoxalines hi- therto examined may be converted into the corresponding indophen- azines by the action of boiling acetic acid, so may also the two mentioned chlorinated Compounds. The isomere melting at a bigher température gives under the said conditions a chloroindophenazine, which bas been found to be identical with the Compound formed by condensation of chlorophenylenediamiue with isatin. The isomere, on the other hand, wbicb melts at a lowei- température gives a chlo- roindophenazine identical with the one obtained, when acetylisatin is brought to act upon chloro-o-phenylenediamine. Acetyl-bromoisatin bebaves in quite the same manner as ace- tylisatin. it yields when treated with o-diamines a mixture of in- dophenazine derivatives and o-amino-phenylhydroxycliinaxaline de- rivatives. V. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Polska Akademia Umiejtnoci. Wydzia Matematyczno-Przyrodniczy. Cracovie : Impr. de l'Université
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