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This work aims to synthesize new pyrazolo[3,4-d]pyrimidines and evaluate their anticancer potential against mutant EGFR/HER2 and Bcl2.

May 20, 2026Open Access

Synthesis of new pyrazolo3,4-dpyrimidines as potential mutant EGFR/HER2 and Bcl2 inhibitors: anticancer evaluation, DFT, molecular docking and ADME studies

Key Points

This work aims to synthesize new pyrazolo[3,4-d]pyrimidines and evaluate their anticancer potential against mutant EGFR/HER2 and Bcl2.
Synthesis of pyrazolo[3,4-d]pyrimidines using 2-(6-methyl-4-oxo-4,5-dihydro-1H-pyrazolo[3,4-d]pyrimidin-3-yl)acetonitrile as starting material.
Cytotoxic effects tested on HepG2, MCF7, and HeLa cell lines compared to erlotinib, reference drug.
Molecular docking studies assessed interactions and binding free energy with EGFR tyrosine kinase domain.
Compounds 8b and 10 showed significant cytotoxicity against EGFR T790M/HER2, with effective DNA phase alterations in breast cancer cell lines.
Binding free energies for 8b and 10 with EGFR TKD were approximately -9.2 and -7.5 kcal/mol, respectively, indicating strong interactions.
Both compounds also reduced Bcl2 levels in breast cancer cells, suggesting a mechanism of action through apoptosis enhancement.

Abstract

Abstract In this work, a novel 2-(6-methyl-4-oxo-4,5-dihydro-1 H -pyrazolo3,4- d pyrimidin-3-yl)acetonitrile 4 was used as starting material to create a new series of pyrazolo3,4-dpyrimidines. DFT calculations and spectroscopic data (IR, 1 H NMR, 13 C NMR, and MS) were used to determine the structure of newly generated products. HepG2, MCF7, and HeLa were specific human cell lines used to evaluate these new compounds. When compared to erlotinib four specific compounds 6c , 8b , 10 and 13c showed strong cytotoxic effects. When erlotinib was used as the reference drug, both 8b and 10 exhibited notable effectiveness against EGFR T790M / HER2. A study of proliferation of breast cancer cell line showed that 8b increased in the percentage of DNA content in the G0-G1 phases, while 10 increased in the percentage of DNA content in the S phase. Furthermore, both 8b and 10 decreased in Bcl2 levels in breast cancer cells. Additionally, both compounds had favourable interaction with the EGFR tyrosine kinase domain (TKD) (PDB ID: 5JEB), with binding free energies (ΔG b ) close to -9.2 and − 7.5 kcal/mol, as revealed by molecular docking study. The molecular docking and ADME probe results were in accordance with the experimental data. In summary, the pyrazolo3,4- d pyrimidines 8b and 10 displayed bioactivities on EGFR T790M / HER2, suggesting their potential possible preclinical candidates for future preclinical studies. Graphical Abstract

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Synthesis of new pyrazolo3,4-dpyrimidines as potential mutant EGFR/HER2 and Bcl2 inhibitors: anticancer evaluation, DFT, molecular docking and ADME studies

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Abstract

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