Benextramine-neuropeptide Y receptor interactions: contribution of the benzylic moieties to [3H]neuropeptide Y displacement activity
作者:Michael B. Doughty、Chandra S. Chaurasia、Ke Li
DOI:10.1021/jm00054a012
日期:1993.1
6-aminohexanoic acid, followed by deprotection of the t-Boc groups with 4 N HCl in dioxane. Acylation of this symmetric diamine with N-hydroxysuccinimide esters of appropriately substituted benzoic acids, followed by reduction of the resultant tetraamides with diborane in refluxing THF, afforded the target compounds. The BXT analog lacking the benzylic group (i.e., compound 11) had no [3H]NPY displacement activity
使用溶液相肽合成方法合成了N,N'-双[6-[([2-甲氧基苄基)氨基]己-1-基]胱胺的类似物(benextramine,BXT,2),并分析了取代特异性结合的活性1 nM N- [丙酰-3H]神经肽Y([3H] NPY)来自大鼠脑中对苯乙胺敏感的神经肽Y(NPY)结合位点。我们对这些类似物的新合成方法开始于,将胱胺与叔丁氧羰基(t-Boc)保护的6-氨基己酸的N-羟基琥珀酰亚胺酯酰化,然后用在二恶烷中的4 N HCl脱保护t-Boc基团。用适当取代的苯甲酸的N-羟基琥珀酰亚胺酯将该对称的二胺酰化,然后在回流的THF中用乙硼烷还原所得的四酰胺,得到目标化合物。缺乏苄基的BXT类似物(即化合物11)在浓度高达1.4 x 10(-3)M时没有[3H] NPY置换活性。邻位,间位和对位的活性范围是9倍在对苯达拉明敏感的NPY大鼠大脑结合位点的甲氧基,氯代和羟基苯达拉明类似物的区域异构体与在α-