Synthesis and antagonistic activities of enantiomers of cyclic platelet-activating factor analogues.
作者:Hideki MIYAZAKI、Norio NAKAMURA、Tomiyoshi ITO、Toshio SADA、Takeshi OSHIMA、Hiroyuki KOIKE
DOI:10.1248/cpb.37.2391
日期:——
Enantiomers of platelet-activating factor (PAF) antagonists, 3-(6-[O-(trans-3-heptadecylcarbamoyloxytetrahydropyran-2-yl)methyl ] phosphonoxy)hexylthiazolium (inner salt) (3), 3-[5-(trans-3-heptadecylcarbamoyloxytetrahydropyran-2-yl) methoxycarbonylamino]pentylthiazolium bromide (4) and 3-(5-[O-(cis-3-heptadecylcarbamoylthiotetrahydropyran-2-yl) methyl]phosphonoxy)pentylthiazolium (inner salt) (5)
血小板活化因子(PAF)拮抗剂的对映异构体,3-(6- [O-(反式-十七烷基氨基甲酰氧基四氢吡喃-2-基)甲基]膦酰氧基)己基噻唑鎓(内盐)(3),3- [5-(反式-3-溴化十七烷基氨基甲酰氧基四氢吡喃-2-基)甲氧羰基氨基]戊基噻唑鎓盐(5)和3-(5- [O-(顺-3-庚基氨基甲酰基硫代四氢吡喃-2-基)甲基]膦酰氧基)戊基噻唑鎓(内盐)从(2R,2R)-和(2S,2S)-酒石酸开始合成。在体外(兔血小板聚集,IC50)和体内(大鼠低血压,ID50)中测量了这些化合物对C16-PAF的拮抗活性。在这三个对映异构体对中,(3S)-(四氢吡喃编号)对映体的效力比(3R)-异构体高一阶:(2R,3S)-3a(R-74,654),IC50 0.59 microM和ID50 0.054 mg /公斤,iv; (2S,3R)-3b,IC50 4。7 microM和ID50 0.30 mg /