The quinazoline ring system is a commonly encountered structural core in a number of natural and synthetic molecules with a wide range of biological activities [1]. Many of the quinazoline derivatives are known to exhibit anti-inflammatory [2], anthelmintic [3], analgesic [4], CNS-depressant [5], and anticonvulsive [6] activities. Metolazone and quinethazone are two quinazoline-based drugs which are used currently as diuretics in medicine [7]. These ...