N-ALKYLATION OF AMIDES AND<i>N</i>-HETEROCYCLES WITH POTASSIUM FLUORIDE ON ALUMINA
作者:Junko Yamawaki、Takashi Ando、Terukiyo Hanafusa
DOI:10.1246/cl.1981.1143
日期:1981.8.5
Alumina coated with potassium fluoride promotes smooth N-alkylation of carboxamides, lactams, and other N-heterocycles with alkyl halides or dialkyl sulfate under mild conditions.
JACKSON, M. B.;MANDER, L. N.;SPOTSWOOD, TH. M., AUSTRAL. J. CHEM., 1983, 36, N 4, 779-788
作者:JACKSON, M. B.、MANDER, L. N.、SPOTSWOOD, TH. M.
DOI:——
日期:——
Jackson, Mervyn B.; Mander, Lewis N.; Spotswood, Thomas M., Australian Journal of Chemistry, 1983, vol. 36, # 4, p. 779 - 788
作者:Jackson, Mervyn B.、Mander, Lewis N.、Spotswood, Thomas M.
DOI:——
日期:——
A New Approach Using Aromatic-Solvent-Induced Shifts in NMR Spectroscopy to Analyze β-Lactams with Various Substitution Patterns
作者:Leticia Chavelas-Hernández、Jonathan R. Valdéz-Camacho、Luis G. Hernández-Vázquez、Blanca E. Dominguez-Mendoza、María G. Vasquez-Ríos、Jaime Escalante
DOI:10.1055/s-0039-1691498
日期:2020.1
The chemicalshifts of protons depend not only on the properties of the solute molecule but also on the medium in which the solute resides. A series of β-lactams with various substitution patterns were synthesized to study aromatic-solvent-induced shifts (ASISs) in chloroform and benzene by using 1H NMR spectroscopy. The results agreed with those obtained by theoretical density functional theory calculations
质子的化学位移不仅取决于溶质分子的性质,还取决于溶质所在的介质。合成了一系列具有各种取代模式的 β-内酰胺,以使用 1 H NMR 光谱研究氯仿和苯中的芳烃溶剂引起的位移 (ASIS)。结果与理论密度泛函理论计算得出的结果一致。β-内酰胺环的质子受ASIS效应影响最大,由于苯的各向异性效应,它们往往会重叠。