Microwave-assisted synthesis and anti-bacterial activity of some 2-Amino-6-aryl-4-(2-thienyl)pyrimidines

Some novel 2-amino-6-aryl-4-(2-thienyl)pyrimidines were synthesized from 3-aryl-1-thien-2ylprop-2-en-1-ones and guanidine hydrochloride in presence of alkali by conventional heating in alcoholic medium and microwave heating in solvent-free conditions. The compounds were evaluated for in vitro anti-bacterial activity. The anti-bacterial data revealed that compounds 5a–e had better activity against tested Gram-positive organisms than the reference ciprofloxacin and norfloxacin. However, the compounds were nearly inactive against Gram-negative bacteria. Compounds 5c and e were the most active compounds against Gram-positive bacteria.