phenols were prepared and investigated by 1H and 13C NMR spectroscopy in chloroform-d1 solution. The chemical shifts of intramolecular hydrogen-bonded protons in Mannich bases depend on the pKa of the parent phenols. A correlation between Hammett's constants, σp, and 13C NMR chemical shifts of para carbon atoms has been found. All the results obtained from 1H and 13C NMR spectra show that in the case
Eleven mono- and diaurates of 2,6-bis((diethylamino)methyl)-4-R-phenols were studied in CD2Cl2 solutions using H-1 NMR spectroscopy. With the monoaurates a collective proton fluctuation occurs in the intramolecular hydrogen-bonded system as known from IR results. With increasing acidity of the phenolic group a low field shift of the sipal of the hydrogen-bonded protons is found, indicating increasing deshielding. The protons arc most strongly deshielded in the R = Cl system, from which it is known that it shows the largest proton polarizability. With further increasing acidity the protons are more and more shielded by the N atoms. When the proton limiting structure in which the hydrogen-bonded protons are preferentially present at the N atoms becomes realized, the signals of the Ph-CH2 and the N-CH2 protons are strongly broadened. When the protons are almost localized at these N atoms, a doublet and an octet, respectively. are observed. These effects arise due to spin-spin coupling between the methylene protons and the NH+ protons.
BARLIN, GORDON B.;IRELAND, STEPHEN J., AUSTRAL. J. CHEM., 41,(1988) N1, C. 1727-1733
作者:BARLIN, GORDON B.、IRELAND, STEPHEN J.
DOI:——
日期:——
Barlin, Gordon B.; Ireland, Stephen J., Australian Journal of Chemistry, 1988, vol. 41, # 11, p. 1727 - 1734
作者:Barlin, Gordon B.、Ireland, Stephen J.
DOI:——
日期:——
[EN] TLR7/8 ANTAGONISTS AND USES THEREOF<br/>[FR] ANTAGONISTES DE TLR7/8 ET LEURS UTILISATIONS
申请人:MERCK PATENT GMBH
公开号:WO2021257273A1
公开(公告)日:2021-12-23
The present invention relates to compounds of the invention and pharmaceutically acceptable compositions thereof, useful as TLR7/8 antagonists.