A New Class of Blockers of the Voltage-Gated Potassium Channel Kv1.3 via Modification of the 4- or 7-Position of Khellinone
作者:Andrew J. Harvey、Jonathan B. Baell、Nathan Toovey、Daniel Homerick、Heike Wulff
DOI:10.1021/jm050839v
日期:2006.2.1
identified two new classes of Kv1.3 blockers: (i) chalcone derivatives of khellinone, and (ii) khellinone dimers linked through the 6-position. Here we describe the multiple parallel synthesis of a new class of khellinone derivatives selectively alkylated at either the 4- or 7-position via the phenolic OH and show that several chloro, bromo, methoxy, and nitro substituted benzyl derivatives inhibit Kv1
电压门控钾通道Kv1.3构成了在自身免疫性疾病中选择性抑制效应记忆T细胞的诱人靶标。我们以前曾报道过天然产物千鸟油酮1a作为通用的先导分子,并确定了两种新的Kv1.3阻滞剂:(i)千鸟油酮的查尔酮衍生物,和(ii)通过6位连接的千鸟油酮二聚体。在这里,我们描述了通过酚羟基在4或7位选择性烷基化的一类新的Khellinone衍生物的多重平行合成,并显示了数个氯,溴,甲氧基和硝基取代的苄基衍生物抑制Kv1.3的亚微摩尔浓度。效力。每个子类中最有效的化合物的典型实例为11m(5-乙酰-4-(4' -氯)苄氧基-6-羟基-7-甲氧基苯并呋喃)和14m(5-乙酰基-7-(4'-溴)苄氧基-6-羟基-4-甲氧基苯并呋喃),Kv1.3嵌段,EC50值为480和400分别为nM。两种化合物对其他Kv1家族通道和HERG均显示中等选择性,无细胞毒性,并在低微摩尔浓度下抑制人T细胞增殖。