Alumina supported-CeCl3·7H2O–NaI: an efficient catalyst for the cyclization of 2′-aminochalcones to the corresponding 2-aryl-2,3-dihydroquinolin-4(1H)-ones under solvent free conditions
作者:Naseem Ahmed、Johan E. van Lier
DOI:10.1016/j.tetlet.2006.11.020
日期:2007.1
supported-TaBr5 as an efficient catalyst for the isomerization of 2′-aminochalcones to the corresponding 2-aryl-2,3-dihydroquinolin-4(1H)-ones under solvent free conditions (Tetrahedron Lett. 2006, 47, 2725–2729). This conversion can be further improved through the use of more economic alumina supported-CeCl3·7H2O–NaI, providing high yields of up to 98% at lower reaction temperatures. This stable catalyst is easily
负载型TaBr我们最近先进硅胶5为2'-aminochalcones异构化为相应的2-芳基-2,3-二氢喹啉-4(1的有效催化剂ħ) -酮下无溶剂的条件下(四面体通讯。2006年,47,2725年至2729年)。通过使用更经济的氧化铝负载的CeCl 3 ·7H 2 O–NaI,可以进一步提高转化率,在较低的反应温度下提供高达98%的高收率。这种稳定的催化剂易于制备,在无溶剂条件下具有活性,并在环境友好的条件下使用。