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
Transition-metal and base-free thioannulation of propynamides with sodium sulfide and dichloromethane for the selective synthesis of 1,3-thiazin-4-ones and thiazolidine-4-ones
A thioannulation of propynamides with sodium sulfide and CH2Cl2 in the absence of transition-metal and base has been established. This one-pot tandem reaction provides a facile and efficient method for the selective synthesis of 1,3-thiazide-4-ones or thiazolidine-4-ones through constructing both C–N and C–S bonds. The atom-economic reaction features mild conditions and good functional group tolerance
Copper-Catalyzed Domino Synthesis of Benzo[4,5]imidazo[1,2-<i>a</i>]pyrimidin-4(10<i>H</i>)-ones using Cyanamide as a Building Block
作者:Zhenbang Lou、Xudong Wu、Haijun Yang、Changjin Zhu、Hua Fu
DOI:10.1002/adsc.201500577
日期:2015.12.14
An efficient and practical copper-catalyzeddominosynthesis of benzo[4,5]imidazo[1,2-a]pyrimidin-4(10H)-ones has been developed. The protocol uses N-(2-halophenyl)-3-alkylpropiolamides and cyanamide as the starting materials, inexpensive copper(I) iodide and pipecolinic acid as the catalyst and ligand, and the corresponding products were obtained in moderate to good yields.
开发了一种高效实用的苯并[4,5]咪唑并[1,2 - a ]嘧啶-4(10 H)-酮的铜催化多米诺合成。该方案以N-(2-卤代苯基)-3-烷基丙酰胺和氰酰胺为起始原料,廉价的碘化铜(I)和哌啉酸为催化剂和配体,并以中等至良好的产率获得了相应的产物。
Co(II)/Ag(I) Synergistically Catalyzed Monoinsertion Reaction of Isocyanide to Terminal Alkynes with H<sub>2</sub>O: Synthesis of Alkynamide Derivatives
作者:Rong Zhang、Zheng-Yang Gu、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1021/acs.orglett.8b02516
日期:2018.9.7
with terminal alkyne and water to afford alkynamide derivatives is reported. The insertion of monoisocyanide into the C–H bond of terminal alkynes is an efficient, straightforward, atom-economical route to alkynamides, which are useful synthons in organic synthesis. This synergistic process achieves the cleavage of a C–H bond and the construction of new C–C and C═O bonds under mild conditions through the