Synthesis, molecular modeling and SAR study of novel pyrazolo[5,1- f ][1,6]naphthyridines as CB 2 receptor antagonists/inverse agonists
作者:Antonio Dore、Battistina Asproni、Alessia Scampuddu、Stefania Gessi、Gabriele Murineddu、Elena Cichero、Paola Fossa、Stefania Merighi、Serena Bencivenni、Gérard A. Pinna
DOI:10.1016/j.bmc.2016.08.055
日期:2016.11
xamide) exhibited the highest CB2 receptor affinity (Ki = 33 nM) and a high degree of selectivity (KiCB1/KiCB2 = 173:1), whereas a similar trend in the near nM range was seen for the bornyl analogue (compound 8f, Ki = 53 nM) and the myrtanyl derivative 8j (Ki = 67 nM). Effects of 8h, 8f and 8j on forskolin-stimulated cAMP levels were determined, showing antagonist/inverse agonist properties for such
合成了吡唑并[5,1- f ] [1,6]萘啶-羧酰胺衍生物,并评估了其对CB 1和CB 2受体的亲和力。基于AgOTf和脯氨酸共催化的多组分方法,5-(对甲苯基)吡唑并[5,1- f ] [1,6]萘啶-2-羧酸乙酯(12)和5-(2,4-乙基)由适当的邻炔基醛,对甲苯磺酰基酰肼和丙酮酸乙酯合成了二氯苯基)吡唑并[5,1- f ] [1,6]萘啶-2-羧酸(13)中间体。大多数新型化合物均具有对甲苯基(8a –i)或三环吡唑并[5,1- f ] [1,6]萘啶骨架的C 5位的2,4-二氯苯基(8j)基序。在C 2位的羧酰胺部分的结构变化包括碱性单环,萜类和金刚烷胺。在这些衍生物中,化合物8h(N-金刚烷-1-基-5-(对甲苯基)吡唑并[5,1- f ] [1,6]萘啶-2-羧酰胺)表现出最高的CB 2受体亲和力(K i = 33 nM)和高选择性(K i CB 1 / K iCB 2 =