Daniel Ernesto Vicentes

• University of Applied and Environmental Sciences

A concise and versatile synthesis of 5-(aryl­methyl­idene­amino)-4-(1H-benzo[d]imidazol-1-yl)py­rimi­dines has been developed, starting from 4-(1H-benzo[d]imidazol-1-yl)py­rimi­dines, and we report here the synthesis and spectroscopic and structural characterization of three such products, along with those of two inter­mediates in the reaction path...

An efficient synthesis of 1-aryl­isochromeno[3,4-d][1,2,3]triazol-5(1H)-ones, involving the diazo­tization of 3-amino-4-aryl­amino-1H-isochromen-1-ones in weakly acidic solution, has been developed and the spectroscopic characterization and crystal structures of four examples are reported. The mol­ecules of 1-phenyl­isochromeno[3,4-d][1,2,3]triazol...

A concise and efficient synthesis of a series of amino-substituted benzimidazole–pyrimidine hybrids has been developed, starting from the readily available N⁴-(2-amino­phen­yl)-6-meth­oxy-5-nitro­sopyrimidine-2,4-di­amine. In each of N⁵-benzyl-6-meth­oxy-4-(2-phenyl-1H-benzo[d]imidazol-1-yl)pyrimidine-2,5-di­amine, C25H22N6O, (I), 6-meth­oxy-N⁵-(4-...

A concise and efficient synthesis of 6-benzimidazolyl-5-nitrosopyrimidines has been developed using Schiff base-type inter­mediates derived from N⁴-(2-amino­phen­yl)-6-meth­oxy-5-nitro­sopyrimidine-2,4-di­amine. 6-Meth­oxy-N⁴-{2-[(4-methyl­benzyl­idene)amino]­phen­yl}-5-nitro­sopyrimidine-2,4-di­amine, (I), and N⁴-{2-[(eth­oxy­methyl­idene)amino]­p...

The mol­ecules of 3-amino-4-anilino-1H-isochromen-1-one, C15H12N2O2, (I), and 3-amino-4-[methyl(phenyl)amino]-1H-isochromen-1-one, C16H14N2O2, (II), adopt very similar conformations, with the substituted amino group PhNR, where R = H in (I) and R = Me in (II), almost orthogonal to the adjacent heterocyclic ring. The mol­ecules of (I) are linked int...