9-Aryl-1,8-dioxo-octahydroxanthene derivatives are synthesized by the reaction of arylaldehydes with dimedone (5,5-dimethyl-1,3-cyclohexanedione) in the presence of nano-TiO2 as an efficient and heterogeneous catalyst under solvent-free conditions. Simple methodology, easy workup procedure, clean reaction, short reaction time, reusability of the catalyst up to 12 times and high yields are some advantages of this work.
Ultrasound promoted rapid and green synthesis of 1,8-dioxo-octahydroxanthenes derivatives using nanosized MCM-41-SO3H as a nanoreactor, nanocatalyst in aqueous media
作者:Shahnaz Rostamizadeh、Ali Mohammad Amani、Gholam Hossein Mahdavinia、Gelareh Amiri、Hamid Sepehrian
DOI:10.1016/j.ultsonch.2009.10.004
日期:2010.2
efficient and green procedure has been developed for the synthesis of 1,8-dioxo-octahydroxanthenes derivatives. The reaction was carried out in water under ultrasound irradiation, using nanosized MCM-41-SO(3)H. In this method, several types of aromatic aldehyde, containing electron-withdrawing groups as well as electron-donating groups, were rapidly converted to the corresponding 1,8-dioxo-octahydroxanthenes