Abstract
Various isomeric structural purine analogues possessing the pyrazolo[3,4-d]pyrimidine
nucleus bearing amino acid moieties have been synthesized. The structures of the synthesized
compounds were elucidated by spectral data. Preliminary testing for in vitro anticancer
activity of the synthesized compounds against Ehrlich ascites carcinoma cells was
carried out.
2-(1-Phenyl-1H-pyrazolo[3,4-d]pyrimidin-4-ylamino)-propanoic acid (3b), 4-methyl-2-(1-phenyl-1H-pyrazolo[3,4-d]
pyrimidin-4-ylamino)-pentanoic acid (3d), 4-methylthio-2-( 1-phenyl- 1H-pyra-zolo[3,4-d]
pyrimidin-4-ylamino)-butanoic acid (3e) and phenyl-2-(1-phenyl-1H-pyrazolo[3,4-d]
pyrimidin-4-ylamino)-propanoic acid (3f) were the most active compounds. Moreover,
compounds 3e and 1-( 1-phenyl-1H-pyrazolo[3,4-d] pyrimidin-4-yl)-pyrrolidine-2-carboxylic
acid (4) exhibited significant in vivo radioprotective activity.
Key words
Anticancer agents - Pyrazolo[3,4-d]pyrimidines, amino acid side chains - anticancer
activity, radioprotective activity, synthesis