ChemInform Abstract: 6‐Carbohydrazonamidepurines: Convenient Precursors for 4,8‐Disubstituted Pyrimido[5,4‐d]pyrimidines.

Abstract

6-Carbohydrazonamidepurines: Convenient Precursors for 4,8-Disubstituted Pyrimido[5,4-d]pyrimidines. -The precursors (III) mentioned in the title are prepared from 6-imidatopurines with hydrazides. They undergo piperidine mediated conversion into pyrimidopyrimidine derivatives. -(ROCHA, A.; BACELAR, A. H.; FERNANDES, J.; PROENCA, M. F.; CARVALHO*, M. A.; Synlett 25 (2014) 3, 343-348, http://dx.doi.org/10.1055/s-0033-1340344 ; Dep. Quim., Univ. Minho, P-4710 Braga, Port.; Eng.) -Mais 30-170