Bioactive Phytochemicals: Efficient Synthesis of Optically Active Substituted Flav-3-enes and Flav-3-en-3-o-R Derivatives
作者:Matthew Chilaka Achilonu、Moosa Mahmood Sedibe、Karabo Shale
DOI:10.1155/2017/3971253
日期:——
3-O-substituted flav-3-ene derivative (3,5,7,3′,4′-pentamethoxyflav-3-ene) 17. The reduction of 4-(1,3,5-trihydroxybenzene)-5,7,3′,4′-tetra-O-benzylflavan-3-one 19b with hydrogen afforded a new compound: 3-hydroxy-4-(1,3,5-trihydroxybenzene)-5,7,3′,4′-tetrahydroxyflavan-3-en-3-ol 21 in good yield (95%), while the acetylation of 19a and 21 afforded the expected novel flav-3-en-3-acetoxy derivatives 20 (92%) and 22
黄酮(2-苯基-2H-色烯)的结构核心通常存在于植物黄酮类化合物中,其表现出广泛的生物活性和多种药理学特征(例如抗氧化和抗癌活性)。黄酮类化合物在药物和合成化学方面引起了极大的兴趣。取代的黄素 3-烯 13 是通过立体选择性消除 5,7,3',4'-四甲氧基黄烷-3-甲磺酸酯 12 的 C-3 上的 O-甲磺酰基部分与 1,8-二氮杂双环 [5.4. 0]undec-7-烯。5,7,3',4'-四甲氧基黄烷-3-one 15 与三氟甲磺酸镱在甲醇中反应得到了一种新型的 3-O-取代的黄烷-3-烯衍生物(3,5,7,3',4' -pentamethoxyflav-3-ene) 17. 4-(1,3,5-trihydroxybenzo)-5,7,3',4'-tetra-O-benzylflavan-3-one 19b 用氢还原得到一种新化合物: