Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Zooming in on the hydrated imidazoline ring expansion : Factors influencing the rate of N → N′ aroyl migration in N-aroyl-N-(hetero)aryl ethylenediamines. / Lavit, Kseniya; Reutskaya, Elena; Grintsevich, Sergey; Sapegin, Alexander; Krasavin, Mikhail.
в: Tetrahedron Letters, Том 61, № 42, 152423, 15.10.2020.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Zooming in on the hydrated imidazoline ring expansion
T2 - Factors influencing the rate of N → N′ aroyl migration in N-aroyl-N-(hetero)aryl ethylenediamines
AU - Lavit, Kseniya
AU - Reutskaya, Elena
AU - Grintsevich, Sergey
AU - Sapegin, Alexander
AU - Krasavin, Mikhail
PY - 2020/10/15
Y1 - 2020/10/15
N2 - The influence of electronic factors on the rates of N → N′ aroyl migration in N-aroyl-N-(hetero)aryl ethylenediamines has been examined. Electron-withdrawing substituents on the aroyl group were found to weakly accelerate the reaction (in linear correlation with the Hammett σp constants). Much stronger influence came from the nitrogen-bound aromatic group which gave a strong linear correlation with the Hammett σp− constants. For electron-deficient heteroaromatics and nitroaromatics, the migration was nearly instantaneous in basic medium. These findings will significantly impact the planning of mechanistically related transformations of N-(2-aminoethyl) lactams through the hydrated imidazoline ring expansion (HIRE) process.
AB - The influence of electronic factors on the rates of N → N′ aroyl migration in N-aroyl-N-(hetero)aryl ethylenediamines has been examined. Electron-withdrawing substituents on the aroyl group were found to weakly accelerate the reaction (in linear correlation with the Hammett σp constants). Much stronger influence came from the nitrogen-bound aromatic group which gave a strong linear correlation with the Hammett σp− constants. For electron-deficient heteroaromatics and nitroaromatics, the migration was nearly instantaneous in basic medium. These findings will significantly impact the planning of mechanistically related transformations of N-(2-aminoethyl) lactams through the hydrated imidazoline ring expansion (HIRE) process.
KW - Addition-elimination
KW - Base-promoted reaction
KW - Hammett σ and σ constants
KW - Hydrated imidazoline ring expansion
KW - N → N′ acyl migration
KW - Hammett σp and σp− constants
KW - 1-ARYL-2-PHENYL-2-IMIDAZOLINES
KW - HYDROLYSIS
KW - Hammett sigma(p) and sigma(-)(p) constants
KW - BASICITY-RATE
KW - N -> N' acyl migration
UR - http://www.scopus.com/inward/record.url?scp=85090592361&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/e74ab283-1730-3543-8f3d-8e4ed01128d6/
U2 - 10.1016/j.tetlet.2020.152423
DO - 10.1016/j.tetlet.2020.152423
M3 - Article
AN - SCOPUS:85090592361
VL - 61
JO - Tetrahedron Letters
JF - Tetrahedron Letters
SN - 0040-4039
IS - 42
M1 - 152423
ER -
ID: 62462942