Brønsted acidic ionic liquids catalyzed the preparation of 13-aryl-5H-dibenzo[b,i]xanthene-5,7,12,14(13H)-tetraones and 3,4-dihydro-1H-benzo[b]xanthene-1,6,11(2H,12H)-triones
作者:Hamid Reza Shaterian、Marziyeh Sedghipour、Ebrahim Mollashahi
DOI:10.1007/s11164-013-1043-1
日期:2014.4
An environmentally green method for the synthesis of 13-aryl-5H-dibenzo[b,i]xanthene-5,7,12,14(13H)-tetraone and 3,4-dihydro-1H-benzo[b]xanthene-1,6,11(2H,12H)-trione derivatives using Brønsted acidic ionic liquids, 3-methyl-1-sulfonic acid imidazolium chloride, 1-H-3-methyl-imidazolium hydrogensulfate, triethylamine-bonded sulfonic acid, and triethylammonium hydrogensulfate as reusable catalysts under thermal solvent-free conditions is described.
一种环境友好的合成方法,用于制备13-芳基-5H-二苯并[b,i]吖啶-5,7,12,14(13H)-四酮和3,4-二氢-1H-苯并[b]吖啶-1,6,11(2H,12H)-三酮衍生物,采用布朗斯特酸性离子液体催化剂,如3-甲基-1-磺酸咪唑氯化物、1-H-3-甲基咪唑硫酸氢盐、三乙胺结合的磺酸以及三乙氨硫酸氢盐,在无溶剂热条件下作为可重复使用的催化剂。