Abstract
A facile synthesis of new 2,6-bis(5-t-butyl-benzo[b]furan-2-ylcarbonyl)pyridines 3a–e is described. The synthesis mainly relies on the ultrasound-assisted Rap-Stoermer reaction of 2,6-bis(bromoacetyl)pyridine (1) with t-butyl substituted salicylaldehydes 2a–e in MeCN with the presence of PEG-400 as catalyst. This procedure is characterized by short reaction times and good yields.
摘要:描述了一种简便的合成新型2,6-双(5-叔丁基苯并[b]呋喃-2-基甲酰)吡啶3a–e。合成主要依赖于超声波辅助下2,6-双(溴乙酰基)吡啶(1)与叔丁基取代水杨醛2a–e在MeCN中在PEG-400存在下进行Rap-Stoermer反应。该方法具有反应时间短、产率高的特点。