作者:Mark Cushman、Dhanapalan Nagarathnam、Debra L. Burg、Robert L. Geahlen
DOI:10.1021/jm00106a047
日期:1991.2
Treatment of o-hydroxyacetophenones 2a-e with excess lithium bis(trimethylsilyl)amide followed by dialkyl carbonates gave alkyl 3-(2-hydroxyaryl)-3-oxopropanoates 3a-e. The latter substances were transformed through the reaction of their magnesium chelates with benzoyl chlorides into a series of 3-(alkoxycarbonyl)-2-arylflavones, which were subsequently elaborated into a variety of flavonoids. These
用过量的双(三甲基甲硅烷基)酰胺锂,然后用碳酸二烷基酯处理邻羟基苯乙酮2a-e,得到3-(2-羟基芳基)-3-氧代丙酸烷基酯3a-e。后者的物质通过其镁螯合物与苯甲酰氯的反应转化为一系列的3-(烷氧基羰基)-2-芳基黄酮,随后将其精加工成各种类黄酮。测试了这些化合物抑制p56lck体外蛋白酪氨酸激酶活性的能力,该酶被认为在淋巴细胞活化过程中在介导CD4受体的信号转导中起关键作用。所有的活性化合物在2-芳基环的4'-位具有氨基或羟基取代基。本研究中制备的活性最高的物质是化合物17c,其功效比天然产物槲皮素(1)高约1个数量级。化合物17c相对于ATP是p56lck的竞争性抑制剂,并且相对于蛋白质丝氨酸/苏氨酸激酶,对蛋白质酪氨酸的抑制具有高度选择性。