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Bromination of quinolin-2(1H)-ones fluorinated on the benzene moiety. / Verkhov, Fyodor K.; Skolyapova, Alexandrina D.; Krasnov, Vyacheslav I. et al.
In: Journal of Fluorine Chemistry, Vol. 268, 110132, 05.2023.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Bromination of quinolin-2(1H)-ones fluorinated on the benzene moiety
AU - Verkhov, Fyodor K.
AU - Skolyapova, Alexandrina D.
AU - Krasnov, Vyacheslav I.
AU - Bagryanskaya, Irina Yu
AU - Andreev, Rodion V.
AU - Karpova, Elena V.
AU - Kalizhnikova, Evgenya E.
AU - Selivanova, Galina A.
N1 - The authors thank the Multi-Access Chemical Service Center SB RAS for spectral and analytical measurements, and Ministry of Science and Higher Education of the Russian Federation (Project FWUE-2022-0002 ) for financial support. The authors thank Ludmila Filatova for conducting a literary search. Публикация для корректировки.
PY - 2023/5
Y1 - 2023/5
N2 - Bromination of ten known fluorinated quinolin-2(1H)-ones by the KBrO3/HBr system is investigated. If there is no F atom in the position 6 of substrate, the Br atom is introduced into position 3 or 6 to form monobromo derivative, the second Br atom is introduced into the same positions leading to 3,6-dibromo product. If a F atom is in position 6, the 3-bromo product is initially obtained, which gives a 3,5-dibromo or 3,8-dibromo derivatives upon further bromination depending on the F atoms positions. In this case, when both positions 5 and 8 of 3-bromoquinolin-2(1H)-one are unsubstituted, the second Br atom is introduced into position 8. If there are more than two F atoms in the benzene moiety, the sole 3-bromo product is obtained. Relative (ΔE) energies of the considered σ−complexes estimated by DFT calculations for the reactions in question are consistent with the experimentally observed regioselectivity.
AB - Bromination of ten known fluorinated quinolin-2(1H)-ones by the KBrO3/HBr system is investigated. If there is no F atom in the position 6 of substrate, the Br atom is introduced into position 3 or 6 to form monobromo derivative, the second Br atom is introduced into the same positions leading to 3,6-dibromo product. If a F atom is in position 6, the 3-bromo product is initially obtained, which gives a 3,5-dibromo or 3,8-dibromo derivatives upon further bromination depending on the F atoms positions. In this case, when both positions 5 and 8 of 3-bromoquinolin-2(1H)-one are unsubstituted, the second Br atom is introduced into position 8. If there are more than two F atoms in the benzene moiety, the sole 3-bromo product is obtained. Relative (ΔE) energies of the considered σ−complexes estimated by DFT calculations for the reactions in question are consistent with the experimentally observed regioselectivity.
KW - Bromination
KW - Bromofluoroquinolin-2-(1H)-ones
KW - Fluorinated quinolin-2(1H)-ones
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85152885941&origin=inward&txGid=6f28541c51de92ac3687490412c252bd
UR - https://www.mendeley.com/catalogue/5e1d50fc-7de7-3cf2-b7a4-68266086d6bb/
U2 - 10.1016/j.jfluchem.2023.110132
DO - 10.1016/j.jfluchem.2023.110132
M3 - Article
VL - 268
JO - Journal of Fluorine Chemistry
JF - Journal of Fluorine Chemistry
SN - 0022-1139
M1 - 110132
ER -
ID: 59646549