Preparation of functionalized 3,4-pyridynes via 2-magnesiated diaryl sulfonates
作者:Wenwei Lin、Ling Chen、Paul Knochel
DOI:10.1016/j.tet.2007.01.027
日期:2007.3
reactive intermediates has been achieved by the controlled elimination of readily generated 2-magnesiated diaryl sulfonates of type 2 obtained by a low temperature I/Mg- or Br/Mg-exchange starting from the corresponding halides of type 3. After trapping with furan, moderate to good yields of the desired functionalized cycloadducts of type 4 are obtained. The addition of a magnesium arylthiolate or magnesium