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Beilstein J. Org. Chem. 2020, 16, 1411–1417, doi:10.3762/bjoc.16.117
Graphical Abstract
Scheme 1: Selective fluorination of isoxazoles and one-pot synthesis of 4-fluoroisoxazoles.
Scheme 2: One-pot reaction for the synthesis of 3,5-disubstituted 4-fluoroisoxazoles 3. aIsolated yield. bIso...
Figure 1: UV–vis and fluorescence (FL) spectra of compounds 3b and 3c.
Scheme 3: Synthesis of BKIs 6 either from 1,3-diketones 1 or from isoxazoles 2.
Scheme 4: Synthesis of enaminoketones 5 and 8 and their conversion to BKIs (yields refer to isolated yields; a...
Scheme 5: Attempted selective fluorination of BKI 6b.
Scheme 6: Ring-opening reaction of 4-fluoroisoxazoles 3 and their conversion into F-BKIs 9 (yields refer to i...
Figure 2: Photochemical properties comparisons of BKIs and F-BKIs. (a–c) BKI 6b: photograph (a), UV–vis (b), ...