An efficient and convenient approach for the synthesis of novel 2-hydroxy-12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthene-11-ones using p-toluenesulfonic acid in ethanol and ionic liquid
作者:Jitender M. Khurana、Bhaskara Nand、Sneha
DOI:10.1002/jhet.661
日期:2011.11
A novel series of 2‐hydroxy‐12‐aryl‐8,9,10,12‐tetrahydrobenzo[a]xanthene‐11‐ones were synthesized by the one‐pot multicomponent condensation of 2,7‐dihydroxynaphthalene, aromatic aldehydes, and cyclic 1,3‐dicarbonyl compounds in the presence of a catalytic amount of p‐toluenesulfonic acid in ethanol and in ionic liquid butyl methyl imidazolium tetrafluroborate ([bmim]BF4). The newly developed protocol
通过2,7-二羟基萘,芳族醛和环的单锅多组分缩合反应合成了一系列新颖的2-羟基-12-芳基-8,9,10,12-四氢苯并[ a ]吨蒽-11-酮1,3-二羰基化合物,在乙醇和离子液体四氟硼酸咪唑鎓丁基甲基磺酸盐([bmim] BF 4)中催化量的对甲苯磺酸存在下。新开发的方案操作简便,适用范围广,并且易于后处理,从而以高纯度提供了高纯度的多种取代的标题化合物。J.杂环化学。(2011)。