Electrophilic <i>ipso</i>-Halocyclization
of <i>N</i>-Arylpropynamides with Polyfluoroalkyl
Alcohols: Selective Synthesis of 8-(Polyfluoroalkoxy)azaspiro[4.5]trienes
作者:Zhi-Qiang Wang、Bo-Xiao Tang、Hong-Ping Zhang、Feng Wang、Jin-Heng Li
DOI:10.1055/s-0028-1087972
日期:——
polyfluoroalkyl alcohols. In the presence of N-halosuccinimides (NXS), a variety of N-arylpropynamides underwent an electrophilic ipso-halocyclization reaction with polyfluoroalkyl alcohols to afford the corresponding 8-(polyfluoroalkoxy)spiro[4.5]trienes in good yields. Note that molecular sieves can improve the yield of the reaction. electrophilic ipso-halocyclization - N-arylpropynamide - N-halosuccinimide
为8-(多氟烷)合成了一种新的且有效的方法-1-氮杂螺[4.5]癸-3,6,9-三烯-2-酮已经经由展示了电本位的-halocyclization Ñ与多氟烷醇-arylpropynamides 。在存在Ñ -halosuccinimides(NXS),各种Ñ -arylpropynamides经历亲电本位-halocyclization与多氟烷醇的反应,得到相应的8-(多氟烷基)螺[4.5]以良好的收率三烯。注意分子筛可以提高反应的产率。 电本位-halocyclization - ñ -arylpropynamide - ñ -halosuccinimide -螺[4.5]癸烷-多氟烷取代