On January 5, 2018, Bollier, Melanie; Klupsch, Frederique; Six, Perrine; Dubuquoy, Laurent; Azaroual, Nathalie; Millet, Regis; Leleu-Chavain, Natascha published an article.Electric Literature of 5098-14-6 The title of the article was One- or Two-Step Synthesis of C-8 and N-9 Substituted Purines. And the article contained the following:
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. The experimental process involved the reaction of 2-Aminomalononitrile 4-methylbenzenesulfonate(cas: 5098-14-6).Electric Literature of 5098-14-6
The Article related to disubstituted purine preparation, aminoimidazole carbonitrile preparation cyclization urea guanidine carbonate phenyl isocyanate, Heterocyclic Compounds (More Than One Hetero Atom): Fused-Ring Systems With Two Or More Hetero Atoms, No More Than One Hetero Atom Per Ring and other aspects.Electric Literature of 5098-14-6
Referemce:
Nitrile – Wikipedia,
Nitriles – Chemistry LibreTexts