作者:Hiroyasu Taguchi、Daijiro Yanagisawa、Shigehiro Morikawa、Koichi Hirao、Nobuaki Shirai、Ikuo Tooyama
DOI:10.1071/ch14464
日期:——
ethoxyphenyl)-1,6-heptadiene-3,5-dione (2a), related to curcumin, and thirteen 4-substituted derivatives were prepared and their keto/enol ratio in DMSO[D6] was determined by 19F NMR because the enolic form of these related curcumins had been shown to bind to amyloid plaques in the Alzheimer brain. The parent compound and the 4-ethoxycarbonyl derivative were almost 100 % in the enolic form that contains
与姜黄素有关的1,7-双(4'-羟基-3'-三氟甲氧基苯基)-1,6-庚二烯-3,5-二酮(2a)制备了13种4-取代的衍生物,并且它们的酮/烯醇比通过19 F NMR测定DMSO [D6]中的D,因为这些相关姜黄素的烯醇形式已显示与Alzheimer脑中的淀粉样蛋白斑块结合。母体化合物和4-乙氧基羰基衍生物的烯醇形式几乎为100%,其中包含共轭的1,ta,4,6-trien-3-on-5-ol骨架。在具有4-取代的烷基的衍生物中,烯醇化减少至不同的量。尝试通过水解O-甲氧基甲基2m或O-四氢吡喃基氧基2n来制备4-羟丙基衍生物受保护的衍生物导致形成环化产品。还制备了模仿固定的烯醇形式的相关嘧啶化合物6b。