Synthesis and adenosine receptors binding studies of new fluorinated analogues of pyrido[2,3-d]pyrimidines and quinazolines
作者:Balakumar Chandrasekaran、Pran Kishore Deb、Sonja Kachler、Raghuram Rao Akkinepalli、Raghuprasad Mailavaram、Karl-Norbert Klotz
DOI:10.1007/s00044-017-2099-z
日期:2018.3
A series of new fluorine containing pyrido[2,3-d]pyrimidines and imidazo[1,2-c]pyrido[3,2-e]pyrimidines along with a series of bioisosteric fluorinated quinazolines were synthesised following appropriate synthetic schemes and characterised by spectral analytical means. X-ray crystal structure of the key precursor 1 (2-amino-3-cyano-4-trifluoro-methyl-6-phenyl-pyridine) was also determined to gain insight
按照适当的合成方案,合成了一系列新的含氟吡啶并[2,3- d ]嘧啶和咪唑并[1,2- c ]吡啶基[3,2- e ]嘧啶以及一系列生物等位氟化的喹唑啉,并进行了表征光谱分析手段。还确定了关键前体1(2-氨基-3-氰基-4-三氟-甲基-6-苯基吡啶)的X射线晶体结构,以了解其反应活性。所有化合物对腺苷受体(ARs)的结合亲和力数据表明,在2和4位(2a)具有游离氨基(NH 2)基的吡啶并[2,3- d ]嘧啶骨架显示出对hA的最大结合亲和力3对hA 1具有相似的亲和力,而对hA 2A AR具有较低的亲和力,导致化合物相对于A 1没有A 3选择性,相对于A 2A AR没有中等选择性(K i hA 1 = 0.62 µM,hA 2A = 3.59 µM和hA 3 = 0.42 µM)。有趣的是,两个氨基都被羰基(C = O)(化合物4)取代导致对hA 1 AR的亲和力显着提高,但对hA 2A和hA