Synthesis of novel 7-substituted pyrido[2′,3′:4,5]furo[3,2-d]pyrimidin-4-amines and their N-aryl analogues and evaluation of their inhibitory activity against Ser/Thr kinases
作者:Emmanuel Deau、Yvonnick Loidreau、Pascal Marchand、Marie-Renée Nourrisson、Nadège Loaëc、Laurent Meijer、Vincent Levacher、Thierry Besson
DOI:10.1016/j.bmcl.2013.10.019
日期:2013.12
The efficient synthesis of 7-substituted pyrido[2′,3′:4,5]furo[3,2-d]pyrimidin-4-amines and their N-aryl analogues is described. 3,5-Dibromopyridine was converted into 3-amino-6-bromofuro[3,2-b]pyridine-2-carbonitrile intermediate which was formylated with DMFDMA. Functionalization at position 7 of the tricyclic scaffold was accomplished, before or after cyclisation step, by palladium-catalyzed Suzuki–Miyaura
描述了7-取代的吡啶并[2',3':4,5]呋喃并[3,2 - d ]嘧啶-4-胺及其N-芳基类似物的有效合成。将3,5-二溴吡啶转化为3-氨基-6-溴呋喃并[3,2 - b ]吡啶-2-甲腈中间体,并用DMFDMA将其甲酰化。在环化步骤之前或之后,通过钯催化的Suzuki-Miyaura交叉偶联完成了三环支架7位的官能化,同时通过微波辅助的甲酰胺降解和Dimroth重排合成了嘧啶4-胺和N-芳基对应物。 , 分别。评估最终产物对一系列五个Ser / Thr激酶(CDK5 / p25,CK1δ/ε,CLK1,DYRK1A,GSK3α/β)的有效抑制作用。化合物35显示出最佳的抑制活性,IC 50值为49 nM,并且在测试的激酶组中被证明对CLK1具有特异性。