Four optical isomers of nipradilol (NIP) were prepared from (3R) -or (3S) -3, 4-dihydro-8-hydroxy-3-nitroxy-2H-1-benzopyran by glycidylation and amination, and evaluated for β-blocking and vasodilating activities. The order of potency of β-blocking activity was S, R-NIP>> S, S-NIP > R, R-NIP>> R, S-NIP. As regards vasodilating activity, S, R-NIP and R, R-NIP were more potent than S, S-NIP and R, S-NIP.
以(3R) -或(3S) -3, 4-二氢-8-羟基-
3-硝基-2H-1-苯并
吡喃为原料,通过
缩水甘油化和胺化反应制备了聂拉地洛(NIP)的四种光学异构体,并对其进行了β-阻断和血管扩张活性评价。β-阻断活性的效力顺序为 S、R-NIP>>S、S-NIP>>R、R-NIP>>R、S-NIP。在血管扩张活性方面,S,R-NIP 和 R,R-NIP 比 S,S-NIP 和 R,S-NIP 更强。