Sulfonated Organic Heteropolyacid Salts: Recyclable Green Solid Catalysts for the Highly Efficient and Green Synthesis of Bis(indolyl)methanes in Water
作者:Seyed M. Vahdat、Samad Khaksar、Saeed Baghery
DOI:10.2174/157017812800221690
日期:2012.2.1
In the present study, we introduce two nonconventional ionic liquids [MIMPS]3PW12O40 (a) and [TEAPS]3PW12O40 (b) as green solid acid catalysts for the efficient synthesis of bis(indolyl)methanes. The reaction of indole with aldehydes or ketones in water afforded the corresponding bis(indolyl)methanes in excellent yields. This reaction has been carried out in the presence of 1 mol% of catalysts at room temperature. The reusability of the catalysts was demonstrated by a six-run test. Additionally, the catalysts pose several advantages including mild reaction conditions, cleaner reactions and shorter reaction times.
在本研究中,我们引入了两种非常规离子液体[MIMPS]3PW12O40 (a) 和[TEAPS]3PW12O40 (b) 作为绿色固体酸催化剂,用于高效合成双(吲哚基)甲烷。吲哚与醛或酮在水中的反应以优异的产率得到相应的双(吲哚基)甲烷。该反应在室温下进行,催化剂用量为1 mol%。通过六轮测试证明了催化剂的可重复使用性。此外,这些催化剂还具有温和的反应条件、反应更清洁和反应时间更短等优点。