214638-10-5Relevant academic research and scientific papers
Fused Tetracyclic quinoxalines from reactions of o-phenylenediamines in polyphosphoric acid
Deady, Leslie W.,Kaye, Anthony J.
, p. 473 - 478 (1997)
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 unsymmetric
