Bollier, Melanie published the artcileOne- or Two-Step Synthesis of C-8 and N-9 Substituted Purines, HPLC of Formula: 5098-14-6, the publication is Journal of Organic Chemistry (2018), 83(1), 422-430, database is CAplus and MEDLINE.
A novel and original strategy to obtain rapidly a large diversity of C-8 and N-9 substituted purines was developed. The present procedure describes annulation reactions in one or two steps starting from 5-aminoimidazole-4-carbonitriles 1–8 in moderate to good yields. 8,9-Disubstituted-6,9-dihydro-1H-purin-6-ones 9–14, 6-amino-8,9-disubstituted-3,9-dihydro-2H-purin-2-ones 15–20, 8,9-disubstituted-3,9-dihydro-2H-purin-2,6-diamines 21–24 and 6-imino-1-phenyl-8,9-disubstituted-6,9-dihydro-1H-purin-2-(3H)-ones 25–26 were synthesized in one step using formic acid, urea, guanidine carbonate, and Ph isocyanate, resp., whereas 8,9-disubstituted-9H-purin-6-amines 27–31 and 6-imino-8,9-disubstituted-6,9-dihydro-1H-purin-1-amines 32–33 were obtained in two steps using formamide and hydrazine, resp.
Journal of Organic Chemistry 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 C10H11N3O3S, HPLC of Formula: 5098-14-6.
Referemce:
https://en.wikipedia.org/wiki/Nitrile,
Nitriles – Chemistry LibreTexts