9-(Trifluoromethyl)fluorenyl Cation: A New Doubly Destabilized Carbocation
摘要:
9-(Trifluoromethyl)fluorenyl tosylate (5) undergoes solvolysis to the corresponding carbocation 3, which is destabilized both by the electron-withdrawing CF3 group and by its potentially antiaromatic fluorenyl cation character.
9-(Trifluoromethyl)fluorenyl Cation: A New Doubly Destabilized Carbocation
作者:Annette D. Allen、Jim D. Colomvakos、Oswald S. Tee、Thomas T. Tidwell
DOI:10.1021/jo00103a001
日期:1994.12
9-(Trifluoromethyl)fluorenyl tosylate (5) undergoes solvolysis to the corresponding carbocation 3, which is destabilized both by the electron-withdrawing CF3 group and by its potentially antiaromatic fluorenyl cation character.
Palladium-catalysed difluoroolefination of benzyl tosylates toward the synthesis of <i>gem</i>-difluoro-2-trifluromethyl styrene derivatives
作者:Jie Xu、Jiangjun Liu、Gang Chen、Baojian Xiong、Xuemei Zhang、Zhong Lian
DOI:10.1039/d2ra02473j
日期:——
We have presented an efficient method to access gem-difluoro-2-trifluromethyl styrene derivatives via palladium catalysis. This method features mild reaction conditions, broad substrate scope and good product yields. Moreover, gram–scale reactions demonstrated the robustness and potential of this method. Control experiments revealed that the –CF3 group was essential to the success of this transformation