Rice husk: A mild, efficient, green and recyclable catalyst for the synthesis of 12-Aryl-8, 9, 10, 12-tetrahydro [a] xanthene-11-ones and quinoxaline derivatives
作者:Farhad Shirini、Somayeh Akbari-Dadamahaleh、Ali Mohammad-Khah、Ali-Reza Aliakbar
DOI:10.1016/j.crci.2012.12.004
日期:2013.3
Résumé Rice husk, as a green and cheap reagent, can be used for the promotion of the synthesis of 12-aryl -8, 9,10,12-tetrahydrobenzo[α] xanthen-11-one derivatives (ATXOs) via three-component reaction of aldehydes, 2-naphthol and 5,5-dimethyl-1,3-cyclohexadione (dimedone) under solvent-free conditions. This catalyst can also be used for the preparation of quinoxaline derivatives in a mixture of H2O and CH3CN at 50 °C. The present methodology offers several advantages such as high yields, simple procedure, low cost, short reaction times, mild reaction conditions and use of a green, cheap and reusable catalyst.
摘要
稻壳作为一种环保且廉价的试剂,可以通过醛、2-萘醇和5,5-二甲基-1,3-环己二酮(dimedone)的三组分反应,在无溶剂条件下促进12-芳基-8, 9,10,12-四氢苯并[α]氟索啶-11-酮衍生物(ATXOs)的合成。该催化剂还可以在50°C的水和CH3CN混合液中用于奎喹唑啉衍生物的制备。本方法具有多项优点,如高产率、简单程序、低成本、短反应时间、温和反应条件,以及使用环保、廉价和可重复使用的催化剂。