Transition metal-free fluorocyclization of unsaturated N-methoxyamides gives cyclic N-methoxyimidates
作者:Fabio Cuzzucoli、Leanne Racicot、John F. Valliant、Graham K. Murphy
DOI:10.1016/j.tet.2022.132982
日期:2022.9
N-methoxyimidates was prepared by the intramolecular fluorocyclization of unsaturated N-methoxyamides. The reaction combined unsaturated amides, a monofluoroiodane, and HFIP as the activator, and this induced an intramolecular fluorocyclization expeditiously at room temperature, giving the products in up to 81% yield in a single step. Two product isomers were chemoselectively produced, depending on whether
通过不饱和N-甲氧基酰胺的分子内氟环化制备了一类新的氟化环状N-甲氧基亚胺。该反应结合了不饱和酰胺、单氟碘烷和 HFIP 作为活化剂,这在室温下迅速诱导了分子内氟环化,一步即可获得高达 81% 的产率。根据是否存在 α-芳烃取代基,化学选择性地产生了两种产物异构体,在这种情况下,典型的反应序列在最终氟化步骤之前被 1,2-苯基移位中断。