Synthesis and structure–activity relationships of thioflavone derivatives as specific inhibitors of the ERK-MAP kinase signaling pathway
作者:Tadashi Kataoka、Shin-ichi Watanabe、Eiji Mori、Ryoji Kadomoto、Susumu Tanimura、Michiaki Kohno
DOI:10.1016/j.bmc.2004.02.002
日期:2004.5
Condensation of nitrobenzaldehydes 3 and alpha-[o-(p-methoxybenzylthio)benzoyl] sulfoxide 4 gave alpha-sulfinyl enones 5. Treatment of 5 with formic acid caused cyclization followed by debenzylation to afford 3-(methylsulfinyl)thioflavanones 6. Double-bond formation with elimination of methanesulfenic acid was performed by refluxing 6 in benzene, and, finally, the nitro group of 2-phenyl-4H-1-benzothiopyran-4-one
硝基苯甲醛3和α-[对-(对甲氧基苄硫基)苯甲酰基]亚砜4的缩合得到α-亚磺酰基烯酮5。用甲酸处理5引起环化,然后脱苄基化得到3-(甲基亚磺酰基)硫代黄酮6。双键通过在苯中回流6进行消除亚甲磺酸的生成,最后,在四氟硼酸中用锡还原2-苯基-4H-1-苯并噻喃-4-酮(硫代黄酮)7的硝基。评价由此制备的各种2'-氨基硫代黄酮8对ERK-MAP激酶途径的抑制作用。在基于细胞的实验中,2-(2'-氨基-3'-甲氧基苯基)-4H-1-苯并噻喃-4-酮(8b)的抑制作用比相应的含氧化合物(PD98059,1)关于Raf诱导的ERK-MAP激酶途径的激活以及细胞增殖。此外,化合物8b选择性和有效地抑制其中ERK-MAP激酶途径被组成性激活的肿瘤细胞的增殖。