Synthesis, molecular modelling and biological evaluation of new 4-aminothiophene and thienopyrimidine compounds

Abstract

A series of 4-amino-5-substituted-thiophene derivatives 3, 5 and 7, along with their corresponding thieno[3,2-d]pyrimidine compounds 4, 6 and 8, were synthesized and characterized. DFT calculations were utilized to determine frontier orbitals energies. The data showed that the compounds have low HOMO and LUMO energies, where 4-methyl thienopyrimidine 4 and 5 have the lowest values. According to results of antibacterial activity against two distinct strains of Gram positive and negative bacteria through two different concentrations (0.5 and 1.0 mg/mL). Compounds 6 and 8 show (IC50 = 43.53±3.26, 45.64±3.42 and 39.72±2.98, 42.57±3.19 mg/mL) good action toward S. aureus compared to chloramphenicol. Meanwhile, cytotoxic activity for inspected derivatives was evaluated toward three cancer cell lines. The investigated thiophene derivatives 4, 6 and 7 were displayed potent cytotoxic effectiveness (14.53±0.54, 11.17±0.42, 16.76±0.63 μM) against MCF-7 versus 5-fluorouracil as standard drug. In addition, the theoretical study such as molecular docking was stimulated.