Ionic liquid mediated Cu-catalyzed cascade oxa-Michael-oxidation: efficient synthesis of flavones under mild reaction conditions
作者:Zhiyun Du、Huifen Ng、Kun Zhang、Huaqiang Zeng、Jian Wang
DOI:10.1039/c1ob06209c
日期:——
Flavonoids are a class of natural products, found in a wide range of vascular plants and dietary components. Their low toxicity and extensive biological activities, including anti-cancer and anti-bacterial, have made them attractive candidates to serve as therapeutic agents for many diseases. Herein, we disclose a highly efficient synthetic method of CuI-catalyzed cascade oxa-Michael-oxidation, using chalcones as substrates, mediated by the ionic liquid [bmim][NTf2] at a low temperature. This efficient synthetic method has demonstrated high synthetic utility and can afford flavones in good to high yields (up to 98%).
黄酮类化合物是一类天然产物,广泛存在于维管植物和饮食成分中。它们具有低毒性和广泛的生物活性,包括抗癌和抗菌作用,使其成为治疗多种疾病的吸引人的候选治疗剂。在这里,我们揭示了一种高效的CuI催化的级联氧杂迈克尔氧化合成方法,以查尔酮为底物,在低温下通过离子液体[bmim][NTf2]介导。这种高效的合成方法展示了高度的合成实用性,可以获得高产率的黄酮类化合物(高达98%)。