A novel and convenient method for the preparation of 5-(diphenylmethylene)-1 H -pyrrol-2(5 H )-ones; synthesis and mechanistic study
作者:Ferenc Faigl、Szilvia Deák、Zoltán Mucsi、Tamás Hergert、László Balázs、Boros Sándor、Barbara Balázs、Tamás Holczbauer、Miklós Nyerges、Béla Mátravölgyi
DOI:10.1016/j.tet.2016.07.032
日期:2016.9
the preparation of 5-(diphenylmethylene)-1H-pyrrol-2(5H)-ones from readily available 1H-pyrroles by sequential dibromination and selective organometallic bromine/lithium exchange followed by reaction with benzophenone. Comparison of various N-substituents was shown to demonstrate the high tolerance of the transformation to functional groups. The structures of the new products were determined by spectroscopic
通过顺序二溴化和选择性有机金属溴/锂交换随后反应,已经开发了一种有效的区域选择性合成方法,用于从易于获得的1 H-吡咯中制备5-(二苯基亚甲基)-1 H-吡咯-2(5 H)-酮。与二苯甲酮。各种N-取代基的比较显示出对转化为官能团的高耐受性。通过光谱法确定新产物的结构,并通过单晶X射线衍射测量证实。此外,还对环内双键的反应机理和选择性官能化进行了理论研究。