Beilstein J. Org. Chem.2018,14, 1452–1458, doi:10.3762/bjoc.14.123
(PhIO)-mediated intramolecular azirination in a one-pot process.
Keywords: azirination; 2H-azirine; iodosobenzene; Togni reagent; β-trifluoromethylation; Introduction
The trifluoromethyl group is a striking structural motif, which can be widely found in the fields of pharmaceutical and agrochemical
, R2 = H) with PhIO in 2,2,2-trifluoroethanol (TFE) afforded 2-trifluoroethoxy-2H-azirines 4 [57]. The latter process involves an intermolecular oxidative trifluoroethoxylation and the subsequent oxidative intramolecular azirination. In continuation of our interest in the construction of the 2H-azirine
skeleton bearing versatile substituents, we herein report that the biologically interesting CF3 group can be incorporated into the privileged 2H-azirine framework through the Togni reagent 1-mediated trifluoromethylation followed by PhIO-mediated azirination in a one-pot process.
Results and Discussion
It
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Graphical Abstract
Figure 1:
Representative pharmaceutical agents bearing the CF3 group.