METHOD OF OBTAINING 1,4-DIOXY QUINOXALINE-2-CARBOXAMIDE DERIVATIVES OR SALTS THEREOF

摘要

1453678 Cyanobenzofurazan 1 - oxides PFIZER Inc 22 Aug 1974 [7 Jan 1974] 24469/76 Divided out of 1453677 Heading C2C Novel compounds of the Formula I wherein the cyano group is in the 5- or 6-position may be prepared by reacting 4-chloro-3- nitrobenzonitrile with a source of azide ion, followed by pyrolysis of the 4-azido-3-nitrobenzonitrile so produced. The compounds I are intermediates for the preparation of pharmaceutical active compounds claimed in Specification 1,453,677.