Synthesis and resolution of (.+-.)-7-chloro-8-hydroxy-1-(3'-iodophenyl)-3-methyl-2,3,4,5-tetrahydro-1H-3-benzazepine (TISCH): a high affinity and selective iodinated ligand for CNS D1 dopamine receptor
作者:Sumalee Chumpradit、Mei Pung Kung、Jeffrey J. Billings、Hank F. Kung
DOI:10.1021/jm00107a002
日期:1991.3
D-1 receptor in rat striatum tissue preparation (Kd = 0.205 nM). The rank order of potency was as follows: SCH-23390 (1a) greater than (+/-)-8 greater than (+)-butaclamol greater than spiperone, WB4101 greater than dopamine, 5-HT. After an iv injection, the R-(+)-[125I]-8 penetrated the blood-brain barrier with ease and displayed specific regional distribution corresponding to the D-1 receptor density
(+-)-7-氯-8-羟基-1-(3'-碘苯基)-3-甲基-2,3,4,5-四氢-1 H-3-苯并ze庚因的合成与拆分,(+ (-)-TISCH(8)通过拆分中间体4,即非对映体樟脑磺酸盐,即O-甲氧基,3'-溴代衍生物而获得。最终产品R-(+)-8和S-(-)-8是通过在碘中加入3'-三丁基锡中间体R-(+)-或S-(-)-7制备的。氯仿,然后进行O-去甲基化。通过使用具有手性柱的HPLC,测定了中间体和最终化合物的光学纯度(大于99%)。放射性碘化是通过碘化[125I]碘化钠和过氧化氢进行的碘-脱锡反应来实现的。不出所料 R-(+)-[125I] -8(活性异构体)对大鼠纹状体组织制备中的CNS D-1受体显示出高亲和力和选择性(Kd = 0.205 nM)。效能的等级次序如下:SCH-23390(1a)大于(+/-)-8大于(+)-丁ac醇大于哌隆,WB4101大于多巴胺,5-HT。静脉注射后,R-(+)-[125I]