Amide Conformational Switching Induced by Protonation of Aromatic Substituent
摘要:
Introduction of an electron-withdrawing group on the aromatic ring of N-methylacetanilide decreased the ratio of the cis conformer, and the ratio correlates well with the Hammett sigma values of the substituents. These steric properties can be applied to achieve amide conformational swiching by protonation at the aromatic substituent of 4-[bis(dimethylamino)]-N-methylacetanilide or N-[p-(dimethylamino)phenyl]-N- phenylacetamide.
Substituted N-aryl Heterocycles, Process For Their Preparation and Their Use As Medicaments
申请人:Schwink Lothar
公开号:US20070207991A1
公开(公告)日:2007-09-06
The invention relates to substituted N-aryl heterocycles and to the physiologically tolerated salts and physiologically functional derivatives thereof.
Compounds of the formula I
in which the radicals have the stated meanings the N-oxides and the physiologically tolerated salts thereof and process for the preparation thereof are described. The compounds are suitable for example as anorectic agents.
Introduction of an electron-withdrawing group on the aromatic ring of N-methylacetanilide decreased the ratio of the cis conformer, and the ratio correlates well with the Hammett sigma values of the substituents. These steric properties can be applied to achieve amide conformational swiching by protonation at the aromatic substituent of 4-[bis(dimethylamino)]-N-methylacetanilide or N-[p-(dimethylamino)phenyl]-N- phenylacetamide.