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Beilstein J. Org. Chem. 2024, 20, 1453–1461, doi:10.3762/bjoc.20.128
Graphical Abstract
Figure 1: Representative pyrazoles with pharmacological activities and S/Se-containing pharmaceutical molecul...
Scheme 1: Approaches for thio/selenocyanation of the pyrazole skeleton.
Scheme 2: PhICl2/NH4SCN-mediated thiocyanation of pyrazoles. Reaction conditions: under N2 atmosphere, a mixt...
Scheme 3: PhICl2/KSeCN-mediated selenocyanation of pyrazoles. Reaction conditions: under N2 atmosphere, a mix...
Scheme 4: Gram-scale synthesis of compounds 2a and 3a and their derivatization.
Scheme 5: Plausible reaction mechanism.
Beilstein J. Org. Chem. 2019, 15, 2958–2965, doi:10.3762/bjoc.15.291
Figure 1: Biologically active chromone derivatives.
Scheme 1: Methods for the synthesis of chromones via dehydrogenative oxidation of chromanones.
Scheme 2: Substrate scope studies. Reaction conditions: 1 (1.0 mmol), PhIO (2.0 mmol), DMF (6 mL), rt. Isolat...
Scheme 3: Control experiments for mechanistic studies.
Scheme 4: Proposed reaction mechanism.
Scheme 5: Application of the reported method to the synthesis of frutinone A.
Beilstein J. Org. Chem. 2018, 14, 1452–1458, doi:10.3762/bjoc.14.123
Figure 1: Representative pharmaceutical agents bearing the CF3 group.
Figure 2: The structures of the Togni reagents 1-(trifluoromethyl)-1,2-benziodoxol-3(1H)-one (1) and trifluor...
Scheme 1: Our previous hypervalent iodine-mediated synthesis of 2H-azirine compounds.
Scheme 2: Study on the presumed Togni reagent 1-mediated trifluoromethylation followed by PhIO-mediated aziri...
Scheme 3: Togni reagent/PhIO-mediated one-pot synthesis of β-trifluoromethyl 2H-azirines. Reaction conditions...
Scheme 4: Control study with TEMPO.
Scheme 5: Proposed mechanism for the Togni reagent-mediated trifluoromethylation of enamines.