New 5-Ht3(Serotonin-3) Receptor Antagonists. II. Synthesis and Structure-Activity Relationships of Pyrimido(1,6-a)indoles.
作者:Masayuki KATO、Shigetaka NISHINO、Kiyotaka ITO、Hisashi YAMAKUNI、Hisashi TAKASUGI
DOI:10.1248/cpb.42.2556
日期:——
for 5-HT3 receptor antagonist activity. The compounds in this series were regarded as bioisosters of the pyrido[1,2-alpha]indol-6(7H)-ones previously reported. High potency was found for compounds having 5-methyl substituents on both the pyrimido[1,6-alpha]indole ring and the imidazole ring. Optimized members of this series, 8b and (+)-26a, were potent 5-HT3 receptor antagonists as determined by measuring
制备了一系列嘧啶并[1,6-α吲哚-1(2H)-ones,并评估了5-HT3受体拮抗剂的活性。该系列化合物被认为是先前报道的吡啶并1,2-α-吲哚-6(7H)-的生物等排体。发现在嘧啶并[1,6-α-吲哚环和咪唑环上均具有5-甲基取代基的化合物]具有高效力。该系列中的优化成员8b和(+)-26a是有效的5-HT3受体拮抗剂,通过测量麻醉大鼠的Bezold-Jarisch反射抑制作用(分别为ED50 0.6和0.8微克/ kg iv)确定,它们是等效的具有比前一篇论文中FK 1052(1)更高或更高的效力,并且比恩丹西酮(2)强20至30倍。