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Synthesis of 6,8-diaminopurines via acid-induced cascade cyclization of 5-amino...

Senhorães, Nádia R.; Silva, Bruna F.; Sousa, Raquel; Leite, Bruna P.; Gonçalves, Jorge M.; Paz, Filipe A. Almeida; Pereira-Wilson, Cristina; Dias, Alice

Inspired by the pharmacological interest generated by 6-substituted purine roscovitine for cancer treatment, 5-aminoimidazole-4-carboxamidine precursors containing a cyanamide unit were prepared by condensation of 5-amino-N-cyanoimidazole-4-carbimidoyl cyanides with a wide range of primary amines. When these amidine precursors were combined with acids, a fast cascade cyclization occurred at room temperature, af...


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