Synthesis of 2,3-dihydroquinazolin-4(1H)-ones via one-pot three-component reaction catalyzed by l-pyrrolidine-2-carboxylic acid-4-hydrogen sulfate (supported on silica gel) as novel and recoverable catalyst
作者:Arash Ghorbani-Choghamarani、Parisa Zamani
DOI:10.1007/s13738-012-0074-7
日期:2012.8
A wide variety of 2,3-dihydroquinazolin-4(1H)-ones has been prepared via one-pot three-component condensation of isatoic anhydride, aldehydes and primary amines or ammonium acetate in the presence of a catalytic amounts of l-pyrrolidine-2-carboxylic acid-4-hydrogen sulfate (supported on silica gel), as green, non-toxic and reusable catalyst, in water at 80 °C.
在催化量的1-吡咯烷-存在下,通过一锅三组分的等酸酐,醛和伯胺或乙酸铵的缩合反应制备了各种2,3-二氢喹唑啉-4(1H)-一。2-羧酸-4-硫酸氢盐(负载在硅胶上),绿色,无毒,可重复使用的催化剂,在80°C的水中。