Chemistry associated with genes has attracted a great public interest during the last two
decades. Nucleotides are the backbone of the nucleic acid molecule. The common …

Pyrazole and pyrimidine derivatives attracted organic chemists due to their various
biological and chemotherapeutic significance. Pyrazolopyrimidines and related fused …

Purine analogues are well known for their importance in biological applications as
antimetabolites [1], especially in the treatment of cancer and viral diseases. Also, purines are …

Heterocyclic compounds with nitrogen atom play a key role in the normal life cycle of a cell.
Pyrazolopyrimidine is a privileged class of nitrogen containing fused heterocyclic compound …

Pyridine, pyrazole, and pyrimidine derivatives attracted organic chemists very much due to
their biological and chemotherapeutic importance. Pyridobenzodiazepine derivatives [1–3] …

The chemical synthesis of certain 4-substituted pyrazolo [3, 4-d] pyrimidine nucleosides is
described. Using 1-(2, 3, 5-tri-0-acetyl-/3-i> ribofuranosyl) pyrazolo [3, 4-d] pyrimidin-4-one …

A large number of heterocyclic compounds containing pyridine rings are associated with
diverse pharmacological properties such as antimicrobial [1, 2], anticancer [3] anticonvulsant …

Pyrazole and pyridine are important heterocycles whose skeletons are incorporated into
many biologically active natural products and synthetic analogues with interesting …

A number of compounds with valuable biological properties have been found among the
pyrazolo [3, 4-d] pyrimidines and their nucleosides. Thus, experimental antitumor activity …

Novel derivatives of pyrazolopyridine and pyridopyrazolopyrimidine were synthesized as
these nitrogen heterocyclic compounds have biological and pharmaceutical application …