Lactone and cyclic ether analogues of platelet-activating factor. Synthesis and biological activities.
作者:Hideki MIYAZAKI、Nobuyuki OHKAWA、Norio NAKAMURA、Tomiyoshi ITOU、Toshio SADA、Takeshi OSHIMA、Hiroyuki KOIKE
DOI:10.1248/cpb.37.2379
日期:——
Six-membered lactone and tetrahydropyran analogues of platelet-activating factor (PAF), 4-11, and related antagonistic derivatives 41-46 were synthesized. None of the δ-lactones 4-7 showed PAF-like activities, while the corresponding cyclic ethers 8, 9 and 11 were slightly active. Some of the cyclic antagonists showed more potent inhibitory activities than the open chain antagonist CV-3988 against platelet aggregation (rabbit platelet-rich plasma, IC50) and hypotension (rat, DI50) induced by C16-PAF : e.g. dl-3-6-[O-(trans-3-heptadeclcarbamoyloxytetrahydropyran-2-yl)methyl]phosphonoxy}hexylthiazolium (inner salt)(4ld)(IC505.5×10-7M, ID500.046mg/kg, i.v.);dl-3-5-[O-(cis-3-heptadecylcarbamoylthiotetrahydropyran-2-yl)methyl]phosphonoxy}pentylthiazolium (inner salt) (43c) (IC505.7×10-7M, ID500.076mg/kg, i.v.).
合成了六元内酯和四氢呋喃类的血小板激活因子(PAF)类似物4-11以及相关的拮抗衍生物41-46。没有发现δ-内酯4-7显示出PAF样活性,而对应的环醚8、9和11则表现出轻微活性。一些环状拮抗剂在抑制由于C16-PAF引起的血小板聚集(兔血小板富集血浆,IC50)和低血压(大鼠,DI50)方面的活性比开链拮抗剂CV-3988更强。例如,dl-3-6-[O-(trans-3-十七烷基氨基甲酰氧基四氢呋喃-2-基)甲基]磷酸氧基}己基噻唑镁(内盐)(4ld)(IC50为5.5×10^-7M,ID50为0.046mg/kg,静脉注射);dl-3-5-[O-(cis-3-十七烷基氨基甲酰基硫四氢呋喃-2-基)甲基]磷酸氧基}戊基噻唑镁(内盐)(43c)(IC50为5.7×10^-7M,ID50为0.076mg/kg,静脉注射)。