A catalytic approach to the base-promoted reaction of epoxides with activated methylenes
作者:Tommaso Angelini、Francesco Fringuelli、Daniela Lanari、Ferdinando Pizzo、Luigi Vaccaro
DOI:10.1016/j.tetlet.2010.01.055
日期:2010.3
This contribution reports the results obtained in the definition of a catalytic method for the nucleophilic ring opening of epoxides by activated methylenes promoted by a polymer-supported base. The attention has been focused on the use of polymer supported bases and the best results have been obtained by using 4-(dimethylamino)pyridine (PS-DMAP) and 2-tert-butylimino-2-diethylamino-1,3-dimethyl-perhydro-1
该贡献报道了在定义催化方法时获得的结果,该催化方法是由聚合物负载的碱促进的活化的亚甲基,环氧化物的亲核开环。注意力集中在聚合物负载的碱的使用上,通过使用4-(二甲基氨基)吡啶(PS-DMAP)和2-叔丁基亚氨基-2-二乙基氨基-1,3-二甲基-过氢基团获得了最佳结果-1,3,2-二氮杂膦都在聚苯乙烯上(PS-BEMP)。无溶剂条件对于实现足够的反应性以实现此过程至关重要,实际上,当使用反应介质时,该过程几乎是不可行的。