
%0 Journal Article
%A Deady, Leslie W. 
%A Kaye, Anthony J. 
%T Fused Tetracyclic Quinoxalines from Reactions of <emph type="2">o</emph>-Phenylenediamines in Polyphosphoric Acid
%J Australian Journal of Chemistry
%D 1997/07/07
%V 50
%N 5
%P 473-478
%K 
%R https://doi.org/10.1071/C96170
%U https://www.publish.csiro.au/paper/C96170 
%X The condensation of 2,3-diaminobenzoic acid and the 5-chloro derivative with o-hydroxyphenylglyoxylic acid, isatin and benzothiophen-2,3-dione in polyphosphoric acid leads to the appropriate tetracycles. Isomeric products are formed from these unsymmetrical diamines, and methods of assigning particular structures are described. 
