Difluorinative ring expansions of benzo-fused carbocycles and heterocycles are achieved with<i>p</i>-(difluoroiodo)toluene
作者:Zhensheng Zhao、Avery J. To、Graham K. Murphy
DOI:10.1039/c9cc08310c
日期:——
A chemoselective fluorinative ring expansion has been realized using the hypervalent iodine (HVI) reagent p-TolIF2, which delivers β,β-difluoroalkyl arenes in yields up to 89% and allylic gem-difluorides in yields up to 78%. This rapid reaction exploits the ambiphilic nature of alkenes and allenes, and incorporates both fluorine atoms of the (difluoroiodo)arene in the products. The mechanism involves
使用高价碘(HVI)试剂p -TolIF 2实现了化学选择性的氟化环扩环,该试剂可提供高达89%的产率的β,β-二氟烷基芳烃和高达78%的烯丙基宝石-二氟化物。这种快速反应利用了烯烃和丙二烯的两亲性质,并将(二氟碘)芳烃的两个氟原子都掺入了产物中。该机制涉及1,2-苯基转移,一步即可提供重要的氟化结构单元,以进行生物活性分子合成。