Taylor, Edward C. published the artcilePteridines. Part XLII. Synthesis of some benzo[g]pteridines. A novel aromatization reaction, Application of 2-Aminomalononitrile 4-methylbenzenesulfonate, the publication is Heterocycles (1977), 6(4), 449-57, database is CAplus.
The benzopteridine I (R = NH2, R1 = R2 = H) was prepared by condensing 6-chloro-2-oximinocyclohexanone-HCl with H2NCH(CN)2.4-MeC6H4SO3H, aromatizing the quinoxaline oxide II by heating with HOAc, and condensing 2-amino-3-cyanoquinoxaline (III) with guanidine-HCl. Condensation of III with HC(OEt)3 gave I (R-R2 = H). I (R = NH2, R1 = R2 = H) was treated with HCl to give benzo[g]pterin. I [R = NH2, R1R2 = (CH)4] was obtained from 2-oximino-1-tetralone.
Heterocycles published new progress about 5098-14-6. 5098-14-6 belongs to nitriles-buliding-blocks, auxiliary class Nitrile,Salt,Sulfonic acid,Amine,Benzene, name is 2-Aminomalononitrile 4-methylbenzenesulfonate, and the molecular formula is C5H6N2O2, Application of 2-Aminomalononitrile 4-methylbenzenesulfonate.
Referemce:
https://en.wikipedia.org/wiki/Nitrile,
Nitriles – Chemistry LibreTexts