Aminofluorination of Cyclopropanes: A Multifold Approach through a Common, Catalytically Generated Intermediate
作者:Cody Ross Pitts、Bill Ling、Joshua A. Snyder、Arthur E. Bragg、Thomas Lectka
DOI:10.1021/jacs.6b02838
日期:2016.5.25
We have discovered a highly regioselective aminofluorination of cyclopropanes. Remarkably, four unique sets of conditions-two photochemical, two purely chemical-generated the same aminofluorinated adducts in good to excellent yields. The multiple, diverse ways in which the reaction could be initiated provided valuable clues that led to the proposal of a "unifying" chain propagation mechanism beyond
effect and the partial rate factor, the cyclopropylradical seems to be fairly free from polar effect, and to resemble the phenyl radical more than the common alkyl radical although the cyclopropylradical has a slightly higher reactivity than the phenyl radical. The relative reactivity of the 2-phenylcyclopropyl radical in the hydrogen abstraction reaction toward the benzylic position of ring-substituted