absolute configurations were determined on the basis of CD spectra in comparison with those of stereochemically defined 9-methyl-1,4-benzodiazepin-2-ones. Examination of the affinity at the human GABAA receptors revealed that each (a1R, a2S) isomer of 1d and 1f possessed higher activity than its antipode (a1S, a2R) isomer. It was also found that 1a, which behaves achirally due to the rapid conformational
制备了C 1 和C 10 位甲基和C 2'
氯基取代的三唑并苯二氮卓类化合物,并研究了它们的理化性质。1,10-二取代的三唑并苯二氮卓类的阻转异构体1d和1f被分离为(a 1 R , a 2 S ) 和(a 1 S , a 2 R ) 异构体。它们的绝对构型是根据 CD 光谱与立体
化学定义的 9-methyl-1,4-benzodiazepin-2-ones 相比确定的。检查人
GABA A的亲和力受体表明,1d和1f的每个(a 1 R,a 2 S)异构体都比其对映体(a 1 S,a 2 R )异构体具有更高的活性。还发现由于快速构象变化而表现出非手性的1a具有最高的
GABA A亲和力,与
三唑仑相同。考虑到1d和1f的每个eutomer都是(a 1 R , a 2 S ),1a在
GABA A结合位点的构象受体预计为(a 1 R,a 2 S)。