Abstract：
C9-methylated quazepam 1 was prepared, and its physicochemical properties were investigated. The atropisomers of 1 were isolated as (a1R, a2S) and (a1S, a2R) isomers. Their absolute configurations were determined based on ECD spectra in comparison with those calculated using the time-dependent density functional theory. Preliminary examination of affinity for the GABAA receptor revealed that the (a1R, a2S) isomer of 1 possessed higher activity than its antipode (a1S, a2R) isomer. The active configuration of C9-methylated quazepam 1 is the same as that of 1,4-benzodiazepin-2-ones.
摘要：
制备C9-甲基化quazepam1，并对其理化性质进行了研究。1的阻转异构体被分离为（a1R，a2S)和(a1S，a2R)异构体。与使用时间依赖性密度泛函理论计算的那些相比，基于ECD光谱确定了它们的绝对构型。对GABAA受体亲和力的初步检查显示（a1R，1的a2S)异构体具有比其对映体(a1S，a2R)异构体。C9-甲基化quazepa1的活性构型与1,4-苯二氮卓-2-酮的活性构型相同。
