2,5-Diarylisothiazolone: novel inhibitors of cytokine-induced cartilage destruction
摘要:
A series of 2,5-diarylisothiazolones is reported that inhibit the IL-lp-induced breakdown of bovine nasal septum cartilage in an organ culture assay. The synthesis and preliminary SAR of these compounds are described. These compounds represent a novel, nonpeptide lead series approach to the mediation of the chronic cartilage breakdown associated with arthritic disease. These compounds are relatively resistant to reductive metabolism by liver microsomal preparations and appear to inhibit cartilage breakdown by interfering with the proteolytic activation of matrix metalloproteinases. Copyright (C) 1996 Elsevier Science Ltd
A regio- and stereoselective thiocyanate addition to ynones is achieved using KSCN in AcOH at 70 °C. The reaction is extendable to ynals, ynesulfones, ynoic acids and ynoates. Adducts from ynones were readily transformed into thiazine-2-thione derivatives under slightly modified reaction conditions. In contrast, thiocyanated adducts from ynamides underwent an in situ decyanative amido cyclization towards
Copper‐Catalyzed Thioannulation of Propynamides with Sodium Sulfide for the Synthesis of Isothiazol‐3‐ones
作者:Sui‐Qian Wang、Bo‐Lun Hu、Xing‐Guo Zhang
DOI:10.1002/adsc.201801579
日期:2019.3.15
A method for the copper‐catalyzed thioannulation of propynamides with sodium sulfide was developed for the synthesis of isothiazol‐3‐ones. The reaction involves a nucleophilic addition and an intramolecular cross‐dehydrogenativecoupling reaction. The thioannulation features the use of an inexpensive and odorless sulfur source and easily prepared propynamides with excellent functional group tolerance
2,5-Diarylisothiazolone: novel inhibitors of cytokine-induced cartilage destruction
作者:Stephen W. Wright、Joseph J. Petraitis、Bruce Freimark、John V. Giannaras、Michael A. Pratta、Susan R. Sherk、Jean M. Williams、Ronald L. Magolda、Elizabeth C. Arner
DOI:10.1016/0968-0896(96)00053-3
日期:1996.6
A series of 2,5-diarylisothiazolones is reported that inhibit the IL-lp-induced breakdown of bovine nasal septum cartilage in an organ culture assay. The synthesis and preliminary SAR of these compounds are described. These compounds represent a novel, nonpeptide lead series approach to the mediation of the chronic cartilage breakdown associated with arthritic disease. These compounds are relatively resistant to reductive metabolism by liver microsomal preparations and appear to inhibit cartilage breakdown by interfering with the proteolytic activation of matrix metalloproteinases. Copyright (C) 1996 Elsevier Science Ltd