吡喹酮 (Praziquantel) 是70年代国外发现的广谱驱虫合成药。1977年报道其对血吸虫病有效后,国内同年进行了试制,并证实该药物对日本血吸虫病疗效显著。吡喹酮为无色晶形粉末,无臭微苦,在正常条件下很稳定。它可溶于氯仿、二甲基亚砜等有机溶剂中,稍溶于乙醇,难溶于水。
体内与体外试验的组织化学观察结果表明,血吸虫经吡喹酮作用后,虫体糖原明显减少,核糖核酸及碱性磷酸酶亦见下降,而碱性蛋白质反应或酸性磷酸酶的活力则增加。该药物具有显著杀灭血吸虫成虫的作用。
作用机制
从分子水平上讲,吡喹酮迅速破坏了虫体内Ca2+平衡,一方面导致虫体活动兴奋、肌肉挛缩,使寄生于门脉系统的血吸虫不能吸附于血管壁而被血流带入肝脏(肝移),进而受到损害;另一方面,导致血吸虫的合胞体皮层受损,除了影响虫的吸收、排泄和分泌功能,导致糖代谢、酶系统等紊乱外,还使虫的体表抗原决定簇暴露,宿主免疫系统得以识别,吸引大量的炎细胞如中性粒细胞、嗜酸性粒细胞、巨噬细胞等聚集在虫体周围施加攻击。
副作用
吡喹酮常见的副作用包括:1. 在首次用药后1小时内可能出现头昏、头痛、恶心、腹痛、腹泻、乏力、四肢酸痛等症状,一般程度较轻,持续时间短,不影响治疗,不需处理;2. 少数病例出现心悸、胸闷等症状,心电图显示T波改变和期外收缩,偶见室上性心动过速、心房纤颤;3. 少数病例可出现一过性转氨酶升高、中毒性肝炎等;4. 偶可诱发精神失常或出现消化道出血;5. 脑疝、过敏反应(皮疹、哮喘)亦有所见。
药代动力学
吡喹酮是一种常用的治疗血吸虫病的药物,对动物毒性极小。口服后在消化道被迅速吸收。血药峰值时间:小鼠为5分钟,大鼠为15~30分钟,犬为30~120分钟,绵羊约2小时。吸收后药物广泛分布于所有组织器官,甚至能透过大鼠血-脑屏障,且能进入犬的胆汁,能促使血吸虫虫体肌细胞膜外的Ca2+内流,引起肌肉挛缩,失去吸着寄生部位的能力。同时引起糖代谢和能量代谢障碍,“伴随免疫”状态被破坏,再经过宿主免疫系统的攻击后导致死亡。
生产方法
工业生产中常用的合成路线有异喹啉路线、哌嗪路线和苯乙胺路线,其中以异喹啉路线较好。由异喹啉与苯甲酰氯及氰化钾加成,催化氢化,重排得1-苯甲酰氨甲基-1,2,3,4-四氢异喹啉,再经氯乙酰化、环合、加压水解、环己酰化而得吡喹酮。
毒性分级
中毒
急性毒性
口服 - 大鼠 LD50: 2840 毫克/公斤; 口服 - 小鼠 LD50: 2454 毫克/公斤
可燃性危险特性
可燃;燃烧产生有毒氮氧化物烟雾
储运特性
通风低温干燥
灭火剂
干粉、泡沫、沙土、二氧化碳、雾状水
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
(11bS)-2-(环己基羰基)-1,2,3,6,7,11B-六氢-4H-吡嗪并[2,1-a]异喹啉-4-酮 | (S)-praziquantel | 57452-97-8 | C19H24N2O2 | 312.412 |
—— | 2-acetyl-2,3,6,7-tetrahydro-1H-pyrazino[2,1-a]isoquinolin-4(11bH)-one | 61196-40-5 | C14H16N2O2 | 244.293 |
—— | 1-Cyclohexylcarbonylaminomethyl-2-chloracetyl-1,2,3,4-tetrahydro-isochinolin | 60567-53-5 | C19H25ClN2O2 | 348.873 |
—— | 2-benzyl-1,2,3,6,7,11b-hexahydro-4H-pyrazino<2,1-a>isoquinolin-4-one | 105279-85-4 | C19H20N2O | 292.381 |
1,2,3,6,7,11B-六氢-4H-吡嗪并[2,1-Alpha]异喹啉-4-酮 | 2,3,6,7-tetrahydro-1H-pyrazino[2,1-a]isoquinolin-4(11bH)-one | 61196-37-0 | C12H14N2O | 202.256 |
2-苄基-1,2,3,6,7,11b-六氢-4H-吡嗪[2,1-a]异喹啉-4-酮 | 2-benzoyl-1,2,3,6,7,11b-hexahydro-4H-pyrazino<2,1-a>isoquinolin-4-one | 54761-87-4 | C19H18N2O2 | 306.364 |
—— | N-((1,2,3,4-tetrahydroisoquinolin-1-yl)methyl)cyclohexanecarboxamide | 79848-93-4 | C17H24N2O | 272.39 |
吡喹酮相关物质B | 2-(Cyclohexylcarbonyl)-2,3,6,7-tetrahydro-4H-pyrazino-<2,1-a>-isoquinolin-4-one | 125273-86-1 | C19H22N2O2 | 310.396 |
—— | 2-methyl-2-propanyl 1-(aminomethyl)-3,4-dihydro-2(1H)-isoquinolinecarboxylate | 1207175-15-2 | C15H22N2O2 | 262.352 |
—— | 4-(cyclohexanecarbonyl)-1-phenethylpiperazine-2,6-dione | 87693-74-1 | C19H24N2O3 | 328.411 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
(11bR)-2-(环己基羰基)-1,2,3,6,7,11B-六氢-4H-吡嗪并[2,1-a]异喹啉-4-酮 | (R)-praziquantel | 57452-98-9 | C19H24N2O2 | 312.412 |
(11bS)-2-(环己基羰基)-1,2,3,6,7,11B-六氢-4H-吡嗪并[2,1-a]异喹啉-4-酮 | (S)-praziquantel | 57452-97-8 | C19H24N2O2 | 312.412 |
—— | 2-(cyclopentanecarbonyl)-2,3,6,7-tetrahydro-1H-pyrazino[2,1-a]isoquinolin-4(11bH)-one | 88529-29-7 | C18H22N2O2 | 298.385 |
—— | (+)-2-(4-oxocyclohexylcarbonyl)-1,2,3,6,7,11b-hexahydro-4H-pyrazino<2,1-a>isoquinolin-4-one | —— | C19H22N2O3 | 326.395 |
外消旋-1,2,3,6,7,11b-六氢-2-[(4-氧代环己基)羰基]-4H-吡嗪并[2,1-a]异喹啉-4-酮 | 2-(4-oxocyclohexylcarbonyl)-1,2,3,6,7,11b-hexahydro-4H-pyrazino<2,1-a>isoquinolin-4-one | 57452-32-1 | C19H22N2O3 | 326.395 |
—— | (-)-2-(4-oxocyclohexylcarbonyl)-1,2,3,6,7,11b-hexahydro-4H-pyrazino<2,1-a>isoquinolin-4-one | —— | C19H22N2O3 | 326.395 |
4-羟基吡喹酮 | 4-hydroxyl-praziquantel | 60743-58-0 | C19H24N2O3 | 328.411 |
—— | 2-(cyclohexylmethyl)-3,6,7,11b-tetrahydro-1H-pyrazino[2,1-a]isoquinolin-4-one | 1463497-65-5 | C19H26N2O | 298.428 |
—— | 2-isobutyryl-2,3,6,7-tetrahydro-1H-pyrazino[2,1-a]isoquinolin-4(11bH)-one | 94494-45-8 | C16H20N2O2 | 272.347 |
—— | 10-aminopraziquantel | 948585-56-6 | C19H25N3O2 | 327.426 |
—— | 2-acetyl-2,3,6,7-tetrahydro-1H-pyrazino[2,1-a]isoquinolin-4(11bH)-one | 61196-40-5 | C14H16N2O2 | 244.293 |
—— | praziquantel | —— | C19H26N2O | 298.428 |
—— | 2-(Cyclohexylcarbonyl)-9-nitro-1,2,3,6,7,11b-hexahydro-4H-pyrazino[2,1-a]isoquinolin-4-one | —— | C19H23N3O4 | 357.409 |
4H-吡喃联氮基[2,1-a]异喹啉-4-酮,2-(氯乙酰基)-1,2,3,6,7,11b-六氢- | 2-chloroacetyl-4-oxo-1,2,3,6,7,11b-hexahydro-4H-pyrazino<2,1-a>isoquinoline | 115822-16-7 | C14H15ClN2O2 | 278.738 |
—— | 2-benzyl-1,2,3,6,7,11b-hexahydro-4H-pyrazino<2,1-a>isoquinolin-4-one | 105279-85-4 | C19H20N2O | 292.381 |
—— | 2-(cyclohexanecarbonyl)-10-nitro-3,6,7,11b-tetrahydro-1H-pyrazino[2,1-a]isoquinolin-4-one | 948585-55-5 | C19H23N3O4 | 357.409 |
1,2,3,6,7,11B-六氢-4H-吡嗪并[2,1-Alpha]异喹啉-4-酮 | 2,3,6,7-tetrahydro-1H-pyrazino[2,1-a]isoquinolin-4(11bH)-one | 61196-37-0 | C12H14N2O | 202.256 |
—— | (S)-praziquanamine | 99746-73-3 | C12H14N2O | 202.256 |
(R)-2,3,6,7-四氢-1H-吡嗪并[2,1-Α]异喹啉-4-(11BH)-酮 | (R)-praziquanamine | 55375-92-3 | C12H14N2O | 202.256 |
2-苄基-1,2,3,6,7,11b-六氢-4H-吡嗪[2,1-a]异喹啉-4-酮 | 2-benzoyl-1,2,3,6,7,11b-hexahydro-4H-pyrazino<2,1-a>isoquinolin-4-one | 54761-87-4 | C19H18N2O2 | 306.364 |
—— | N-[[4-[(11bR)-4-oxo-3,6,7,11b-tetrahydro-1H-pyrazino[2,1-a]isoquinoline-2-carbonyl]phenyl]methyl]-6-[3-(3-methyldiazirin-3-yl)propanoylamino]-N-prop-2-ynylhexanamide | 1609979-52-3 | C34H40N6O4 | 596.729 |
—— | 2-isonicotinoyl-2,3,6,7-tetrahydro-1H-pyrazino[2,1-a]isoquinolin-4(11bH)-one | 57452-82-1 | C18H17N3O2 | 307.352 |
—— | N-(1,2,3,4-tetrahydro-1-isoquinolinyl- methyl)-N-cyclohexyl-carbonyl glycine | —— | C19H26N2O3 | 330.427 |
—— | 2-(thiophen-2-ylmethyl)-2,3,6,7-tetrahydro-1H-pyrazino[2,1-a]isoquinolin-4(11bH)-one | 1463497-66-6 | C17H18N2OS | 298.409 |
—— | 2-(furan-2-carbonyl)-2,3,6,7-tetrahydro-1H-pyrazino[2,1-a]isoquinolin-4(11bH)-one | 94508-17-5 | C17H16N2O3 | 296.326 |
—— | 2-(thiophene-2-carbonyl)-2,3,6,7-tetrahydro-1H-pyrazino[2,1-a]isoquinolin-4(11bH)-one | 94508-13-1 | C17H16N2O2S | 312.392 |
—— | 2-chloro-1-(3,4,6,7-tetrahydro-1H-pyrazino[2,1-a]isoquinolin-2(11bH)-yl)ethanone | 1463497-75-7 | C14H17ClN2O | 264.755 |
吡喹酮相关物质C | 2-<2-N-(cyclohexylcarbonyl)-N-formyl-amioacyl>-1,2,3,4-tetrahydroisoquinolin-1-one | 125273-88-3 | C19H22N2O4 | 342.395 |
—— | phenyl-(3,4,6,7-tetrahydro-1H-pyrazino[2,1-a]isoquinolin-2(11bH)-yl)methanone | 5315-01-5 | C19H20N2O | 292.381 |
2,3,4,6,7,11b-六氢-1H-吡嗪o[2,1-a]异喹啉 | 1,3,4,6,7,11b-hexahydro-2H-pyrazino[2,1-a]isoquinoline | 5234-86-6 | C12H16N2 | 188.272 |
—— | N-[4-[(11bR)-4-oxo-3,6,7,11b-tetrahydro-1H-pyrazino[2,1-a]isoquinoline-2-carbonyl]phenyl]-N-prop-2-ynyl-4-[3-(trifluoromethyl)diazirin-3-yl]benzamide | 1609979-50-1 | C31H24F3N5O3 | 571.558 |
—— | (3,4,6,7-tetrahydro-1H-pyrazino[2,1-a]isoquinolin-2(11bH)-yl)(thiophen-2-yl)methanone | 1215603-73-8 | C17H18N2OS | 298.409 |
吡喹酮相关物质B | 2-(Cyclohexylcarbonyl)-2,3,6,7-tetrahydro-4H-pyrazino-<2,1-a>-isoquinolin-4-one | 125273-86-1 | C19H22N2O2 | 310.396 |