Using cheap, readily available, and economic activeMnO2 as an oxidant, a series of 2,4-disubstituted quinazoline-3-oxides were synthesized in good to excellent yields by oxidation of the correspon...
Novel 2,2,4-trialkyl-1,2-dihydroquinazoline-3-oxides and their synthesis are described. These compounds possess cardiotonic activity, and are useful for the treatment of heart failure.