Synthesis of new hyodeoxycholic acid thiosemicarbazone derivatives under solvent-free conditions using microwave
摘要:
An efficient and simple method for synthesis of new hyodeoxycholic acid thiosemicarbazone derivatives under solvent-free conditions using microwave has been developed. Its main advantages are short reaction times, good conversions and the environmentally friendly nature of the process. The preliminary results indicate that some of these compounds possess inhibitory effects against E. coli. (C) 2010 Zhi Gang Zhao. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.
Mercaptoacetic acid based expeditious synthesis of polyfunctionalised 1,3-thiazines
作者:Lal Dhar S. Yadav、Seema Yadav、Vijai K. Rai
DOI:10.1016/j.tet.2005.08.021
日期:2005.10
novel three-component expeditious synthesis of 3,6-diaryl-5-mercaptoperhydro-2-thioxo-1,3-thiazin-5-ones from 2-methyl-2-phenyl-1,3-oxathiolan-5-one, an aromatic aldehyde and an N-aryldithiocarbamic acid is reported. The synthesis is diastereoselective and involves tandem Knoevenagel, Michael and ring transformation reactions under solvent-free microwaveirradiation in a one-pot procedure.
The present invention is directed to methods and compositions for activating a Parkin ligase by administering to a subject in need thereof a therapeutically effective amount of a compound that disrupts at least one Parkin ligase zinc finger. The present invention is also directed to methods of treating and/or reducing the incidence of diseases or conditions related to the activation of Parkin ligase.
1H and13C NMR studies on 3-aryl-2-thioxo-4-oxazolidinones and 3-arylrhodanines
作者:Zihni Aksaç、Esat Pinar、Sîddîk Içli
DOI:10.1002/omr.1270210906
日期:1983.9
Abstract3‐Aryl‐2‐thioxo‐4‐oxazolidinones and 3‐arylrhodanines have been studied for magnetic non‐equivalence of diastereotopically related proton and 13C nuclei in rotational isomers, and for steric interactions between the aryl and heterocyclic moieties of these compounds. For the majority of rotational isomers the barriers to internal rotation about the aryl CN bond were >100 kJ mol−1, due to the steric bulk of the thiocarbonyl group. Chemical isolation of several of the diastereomers was achieved. The enhanced steric effect and the difference in the electronic effect of the sulphur atom in relation to the oxygen atom appeared to have no influence on the small chemical shift differences of the rotational isomers, detected for some 1H and some 13C nuclei.