Condensed pyrazole derivatives are important heterocyclic compounds due to their
excellent biological activities and have been widely applied in pharmaceutical and …

The condensation of 5-aminopyrazole with various bielectrophilic moieties results in the
formation of pyrazoloazines, an interesting array of fused heterocyclic systems. The …

Abstract New derivatives of pyrazolo [3, 4‐b] pyrazine and related heterocycles were
prepared starting from 6‐amino‐3‐methyl‐1‐phenyl‐1H‐pyrazolo [3, 4‐b] pyrazine‐5 …

A series of 1-aryl-4-(4, 5-dihydro-1H-imidazol-2-yl)-1H-pyrazoles (4a–g) and 5-amino-1-aryl-
4-(4, 5-dihydro-1H-imidazol-2-yl)-1H-pyrazoles (5a–g) were synthesized and evaluated in …

A new series of metal complexes containing Co (II), Pd (II), Fe (III) chloride and Cu (II) salts
(chloride, bromide, sulphate and perchlorate) have been prepared with Schiff base ligand …

Pyrazines are important class of pharmacophores because of their versatility in
pharmacological activity. Pyrazines are among the most widely known heterocyclic …

A novel series of 5-amino-6-substituted-3-methyl-1-phenyl-1H-pyrazolo [3, 4-b] selenolo [3,
2-e] pyrazines (3a–e) was synthesized by the reaction of the chloro pyrazolo [3, 4-b] …

The synthesis of 3-methyl-1, 4-diphenyl-7-thioxo-4, 6, 8, 9-tetrahydropyrazolo [5, 4-b]
pyrimidino [5, 4-e] pyridine-5-one (6) was achieved by two different one-pot multi-component …

A series of new pyrazolo [3, 4-b] pyrazines containing, 1, 2, 4-oxadiazolyl, thiadiazolyl,
imidazothiadiazolyl, thiazolidinonyl, substituents and other different substituents, was …

The reaction of the aminopyrazole 1 with benzenesulfonyl chloride, arenediazonium salt,
chloroacetyl chloride, ethoxy methyleneamlononitrile and with ethyl 2‐cyano‐3 …