A number of derivatives of 6-amino-2-fluoromethyl-3-(o-tolyl)-4 (3H)-quinazolinone (15), a potent muscle relaxant, have been prepared and screened in terms of the loss of righting reflex test and the rotating rod test in mice. Several derivatives with additional fluorine substitution or with repositioning of the fluorine atom exhibited high activities. Other structural modifications included acylation, carbamoylation, and alkoxycarbonylation of the 6-amino group, hydroxylation at the 3-tolyl group, and replacement of the fluorine atom at the 2-fluoromethyl group by oxygen, nitrogen, and sulfur nucleophiles ; these modifications all resulted in loss of activity.
制备了多种强效肌肉松弛剂6-
氨基-2-
氟甲基-3-(邻
甲苯基)-4(3H)-
喹唑啉酮(15)衍
生物,并通过翻正反射丧失试验进行筛选以及小鼠旋转棒试验。具有额外
氟取代或
氟原子重新定位的几种衍
生物表现出高活性。其他结构修饰包括6-
氨基的酰化、
氨基甲酰化和烷氧基羰基化、3-
甲苯基的羟基化以及2-
氟甲基上的
氟原子被氧、氮和
硫亲核体取代;这些修改都导致活性丧失。