Cyclic nucleotide phosphodiesterase type 4 inhibitors: Evaluation of pyrazolo[1,5-a]-1,3,5-triazine ring system as an adenine bioisostere
作者:Pierre Raboisson、Dominique Schultz、Christian Muller、Jean-Marie Reimund、Guillaume Pinna、Romain Mathieu、Philippe Bernard、Quoc-Tuan Do、Renee L. DesJarlais、Hélène Justiano
DOI:10.1016/j.ejmech.2007.05.016
日期:2008.4
5-a]-1,3,5-triazines were considered as a bioisosteric replacement for the 9-substituted adenine derivatives resulting in the discovery of 8-(2-methoxybenzyl)-4-(N-methylamino)-2-n-propylpyrazolo[1,5-a]-1,3,5-triazine (14d) and 2-trifluoromethyl-8-(2-methoxybenzyl)-4-(N-methylamino)pyrazolo[1,5-a]-1,3,5-tria zine (14e) as a new structural class of potent phosphodiesterase type 4 inhibitors (IC(50)=13
一系列的8-取代的吡唑并[1,5-a] -1,3,5-三嗪被认为是9-取代的腺嘌呤衍生物的生物立体替代品,从而发现了8-(2-甲氧基苄基)-4- (N-甲基氨基)-2-正丙基吡唑并[1,5-a] -1,3,5-三嗪(14d)和2-三氟甲基-8-(2-甲氧基苄基)-4-(N-甲基氨基)吡唑并[1,5-a] -1,3,5-三嗪(14e)作为具有强同工酶选择性的新型4类有效磷酸二酯酶抑制剂(IC(50)= 13 nM和11 nM)。反应的原始串联涉及容易获得的8-碘-2-甲基-4-(N-甲基-N-苯基氨基)吡唑并[1,5-a] -1的钯介导的交叉偶联反应(PMCCR) ,3,5-三嗪(11a)和芳基硼酸或炔烃,然后置换N-甲基-N-苯基氨基,是本文开发的新型合成方法中的关键步骤。用n-BuLi和选定的醛处理11a-c代表了PMCCR有趣的替代方法,用于合成苄基衍生物14a-i。初步生物学测试表明