Synthesis of 4, 4-ditritio-(+)-nicotine: Comparative Binding and Distribution Studies with Natural Enantiomer
作者:William C. Vincek、Billy R. Martin、Mario D. Aceto、Hem L. Tripathi、Everette L. May、Louis S. Harris
DOI:10.1002/jps.2600701131
日期:1981.11
preparation of 4,4-ditritio-(+)-nicotine (Vb) (specific activity 10.3 Ci/mmole)from (+)-nicotine (Ib) via (-) 4,4-dibromocotinine (IIIb) is described. Although Ib is 10-30 times less potent than (-)-nicotine (Ia) in the CNS, its binding affinity for the crude mitochondrial or nuclear fraction of whole rat brain is only three times less than that of Ia. However, distribution studies showed that the maximum
描述了通过(-)4,4-二溴烟碱(IIIb)由(+)-烟碱(Ib)制备4,4-二氢-(+)-烟碱(Vb)(比活为10.3 Ci / mmol)。尽管在CNS中,Ib的效力比(-)-尼古丁(Ia)低10-30倍,但其对整个大鼠脑的粗线粒体或核部分的结合亲和力仅比Ia低三倍。但是,分布研究表明,以2毫克/千克的剂量给药后,(-)-[3H]烟碱的最大脑水平几乎是(+)-[3H]-烟碱的两倍。结合亲和力和立体异构体的位置占烟碱药理学立体特异性的一部分。