2-Position-Selective C–H Perfluoroalkylation of Quinoline Derivatives
作者:Takahiro Shirai、Motomu Kanai、Yoichiro Kuninobu
DOI:10.1021/acs.orglett.8b00339
日期:2018.3.16
We developed 2-position-selective, direct C–H trifluoromethylation, pentafluoroethylation, and heptafluoropropylation of quinolinederivatives. Regioselective transformation was achieved without derivatization of the quinolines. The reaction proceeded at room temperature with high functional group tolerance, even in gram scale. Notably, the reaction was applicable to substrates containing a functional
Direct C-H trifluoromethylation of heterocycles is a valuable transformation. In particular, nonprecious metal-catalyzed C-H trifluoromethylation processes, which do not proceed through CF3 radical species, have been less developed. In this cluster report, a new copper-catalyzed aerobic C-H trifluoromethylation of phenanthrolines is described. This transformation affords trifluoromethylated phenanthrolines
Deoxygenative Amination of Azine-<i>N</i>-oxides with Acyl Azides via [3 + 2] Cycloaddition
作者:Dongeun Kim、Prithwish Ghosh、Na Yeon Kwon、Sang Hoon Han、Sangil Han、Neeraj Kumar Mishra、Saegun Kim、In Su Kim
DOI:10.1021/acs.joc.9b03173
日期:2020.2.21
an isocyanate from the starting acyl azide via a Curtius rearrangement can trigger a [3 + 2] dipolar cycloaddition of polar N-oxide fragments to generate the aminated azine derivative. The applicability of this method is highlighted by the late-stage and sequential amination reactions of complex bioactive compounds, including quinidine and fasudil. Moreover, the direct transformation of aminated azines