Polymethoxyflavones as agents that prevent formation of cataract: Nobiletin congeners show potent growth inhibitory effects in human lens epithelial cells
Posterior capsular opacification (PCO) is the most frequent complication and the primary reason for visual decrease after extracapsular cataract surgery. The proliferation and migration of leftover lens epithelial cells (LECs) after surgery may contribute to the development of PCO. To prevent PCO, a rational approach would be to inhibit both the proliferation and the migration of LECs using nontoxic xenobiotics. Nobiletin, one of the most abundant polymethoxyflavones (PMFs) in citrus peel, and its synthetic congeners displayed a potent inhibition of LEC proliferation. Structural features which enhance anti-proliferative activity have also been discussed. (C) 2012 Elsevier Ltd. All rights reserved.
Microwave-Assisted Efficient Synthesis of Polymethoxyacetophenones and Natural Polymethoxyflavones, and Their Inhibitory Effects on Melanogenesis
作者:Masao Tsukayama、Eiji Kusunoki、Mohammad M. Hossain、Yasuhiko Kawamura、Shinji Hayashi
DOI:10.3987/com-07-11054
日期:——
Microwave-assisted Friedel-Crafts acetylation of polymethoxybenzenes with aceticanhydride in the presence of In(CF 3 SO 3 ) 3 under solvent-free conditions was achieved rapidly to give polymethoxyacetophenones in high yields. Microwave-assisted benzoylation of 2'-hydroxypolymethoxyacetophenones with polymethoxybenzoyl chlorides, followed by the rearrangement of the resulting benzoates and the final
在无溶剂条件下,在 In(CF 3 SO 3 ) 3 存在下,多甲氧基苯与乙酸酐的微波辅助傅-克乙酰化反应迅速,得到高产率的多甲氧基苯乙酮。2'-羟基聚甲氧基苯乙酮与聚甲氧基苯甲酰氯的微波辅助苯甲酰化反应,然后对所得苯甲酸酯进行重排,最终快速有效地形成天然聚甲氧基黄酮。多甲氧基黄酮对人黑色素瘤细胞中的黑色素生成具有抑制作用。