The present invention relates to modulators of muscarinic receptors. The present invention also provides compositions comprising such modulators, and methods therewith for treating muscarinic receptor mediated diseases.
Potassium tert-Butoxide Facilitated Amination of Carboxylic Acids with N,N-Dimethylformamide
作者:Jing Zhang、Yuanjing Huang
DOI:10.1055/a-1817-1965
日期:2022.8
Herein a practical and efficient potassium tert-butoxide (KO t Bu)-facilitated amination of carboxylic acids with N,N-dimethylamine is described. In the presence of catalytic amount of KO t Bu, a variety of aliphatic and aromatic carboxylic acids are transformed to N,N-dimethylamides using DMF as the dimethylamine reagent with the assistance of trimethylacetic anhydride. The applicability of this protocol
本文描述了一种实用且有效的叔丁醇钾 (KO t Bu)-促进羧酸与N , N-二甲胺的胺化。在催化量的 KO t Bu 存在下,在三甲基乙酸酐的帮助下,使用 DMF 作为二甲胺试剂,多种脂肪族和芳香族羧酸转化为N,N-二甲基酰胺。该协议的适用性通过复杂药物分子的后期二甲基酰胺化得到证明。涉及 KO t的似是而非的反应机制 在机理研究的基础上,提出了由甲酰胺分解和酸酐介导的缩合促进 Bu 促进的原位胺生成。
Investigations onN,N-dialkylbenzamides by NMR spectroscopy: 5—Analysis of static and dynamic proton NMR spectra of 2-fluoro- and 2,6-difluoro-N,N-dimethyl- andN,N-diethyl-benzamides
作者:Thomas Dürst、Adam Gryff-Keller、Jacek Terpiński
DOI:10.1002/omr.1270211103
日期:1983.11
AbstractThe analysis of static and dynamic proton NMR spectra of 2‐fluoro‐ and 2,6‐difluoro‐N,N‐dimethyl‐ and N,N‐diethyl‐benzamides at various temperatures has been carried out. The conformations of the compounds have been deduced on the basis of long‐range through‐space proton‐fluorine couplings. Free energies of activation of amide rotation have been determined for all compounds, and of carbonyl‐ring rotation for one compound.