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Electrophilic Activation of 1-Aryl-3-bromo-2,2-difluoropropan-1-ones by Triflic Acid in Reactions with Arenes. / Aleksandrova, Maiia I.; Ivanov, Alexander Yu; Dilman, Alexander D.; Vasilyev, Aleksander V.
в: European Journal of Organic Chemistry, Том 2019, № 34, 15.09.2019, стр. 5905-5911.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Electrophilic Activation of 1-Aryl-3-bromo-2,2-difluoropropan-1-ones by Triflic Acid in Reactions with Arenes
AU - Aleksandrova, Maiia I.
AU - Ivanov, Alexander Yu
AU - Dilman, Alexander D.
AU - Vasilyev, Aleksander V.
PY - 2019/9/15
Y1 - 2019/9/15
N2 - The reactions of 1-aryl-3-bromo-2,2-difluoropropan-1-ones [Ar(CO)CF2CH2Br] with various arenes Ar′H in the superacid TfOH at room temperature for 1–7 h result in the formation of products of hydroarylation of the carbonyl group, 1,1-diaryl-3-bromo-2,2-difluoropropan-1-ols [ArAr′C(OH)CF2CH2Br], in yields up to 85 %. The reaction with benzene goes deeper and leads to 1-aryl-3-bromo-2,2-difluoro-1,1-diphenylpropanes [ArCPh2CF2CH2Br] in good yields. Mainly, the bromomethyl group (CH2Br) of starting ketones remains untouched under the superacidic conditions. Cationic intermediates of the reaction have been studied by means of NMR spectroscopy. Plausible reaction mechanism is discussed.
AB - The reactions of 1-aryl-3-bromo-2,2-difluoropropan-1-ones [Ar(CO)CF2CH2Br] with various arenes Ar′H in the superacid TfOH at room temperature for 1–7 h result in the formation of products of hydroarylation of the carbonyl group, 1,1-diaryl-3-bromo-2,2-difluoropropan-1-ols [ArAr′C(OH)CF2CH2Br], in yields up to 85 %. The reaction with benzene goes deeper and leads to 1-aryl-3-bromo-2,2-difluoro-1,1-diphenylpropanes [ArCPh2CF2CH2Br] in good yields. Mainly, the bromomethyl group (CH2Br) of starting ketones remains untouched under the superacidic conditions. Cationic intermediates of the reaction have been studied by means of NMR spectroscopy. Plausible reaction mechanism is discussed.
KW - Aromatic substitution
KW - Difluoroalcohols
KW - Difluoroketones
KW - Protonation
KW - Triflic acid
UR - http://www.scopus.com/inward/record.url?scp=85071603353&partnerID=8YFLogxK
UR - http://www.mendeley.com/research/electrophilic-activation-1aryl3bromo22difluoropropan1ones-triflic-acid-reactions-arenes
U2 - 10.1002/ejoc.201900975
DO - 10.1002/ejoc.201900975
M3 - Article
AN - SCOPUS:85071603353
VL - 2019
SP - 5905
EP - 5911
JO - European Journal of Organic Chemistry
JF - European Journal of Organic Chemistry
SN - 1434-193X
IS - 34
ER -
ID: 49830567