2,3-Diaryl-5-anilino[1,2,4]thiadiazoles as melanocortin MC4 receptor agonists and their effects on feeding behavior in rats
作者:Kevin Pan、Malcolm K Scott、Daniel H.S Lee、Louis J Fitzpatrick、Jeffery J Crooke、Ralph A Rivero、Daniel I Rosenthal、Anil H Vaidya、Boyu Zhao、Allen B Reitz
DOI:10.1016/s0968-0896(02)00428-5
日期:2003.1
The melanocortin-4 receptor (MC4) modulates physiological functions such as feeding behavior, nerve regeneration, and drug addiction. Using a high throughput screen based on I-121-NDP-MSH binding to the human MC4 receptor, we discovered 2,3-diaryl-5-anilino[1,2,4]thiadiazoles 3 as potent and selective MC4 receptor agonists. Through SAR development on the three attached aryl rings, we improved the binding affinity from 174 nM to 4.4 nM IC50. When delivered intraperitoneally, compounds 3a, 3b, and 3c induced significant inhibition of food intake in a fasting-induced feeding model in rats. When delivered orally, these compounds lost activity, mainly due to rapid metabolism to inactive imidoylthiourea reduction products. (C) 2002 Elsevier Science Ltd. All rights reserved.
Calcium mediated efficient synthesis of <i>N</i>-arylamidines from organic nitriles and amines
作者:Indrani Banerjee、Shweta Sagar、Tarun K. Panda
DOI:10.1039/d0ob00805b
日期:——
electron-withdrawing to electron-donating substitutions as well as heterocyclic substitution. The reaction was carried out in a solvent-free medium under ambient conditions. The nucleophilic addition of aromatic amines to aryl nitriles led to good to excellent yields of the corresponding amidines. The reactivity of the amidines was further examined and the respective urea derivatives were achieved in excellent yields