Pyrazole-based sulfonamide and sulfamides as potent inhibitors of mammalian 15-lipoxygenase
摘要:
A series of inhibitors of mammalian 15-lipoxygenase (15-LO) based on a 3,4,5-tri-substituted pyrazole scaffold is described. Replacement of a sulfonamide functionality in the lead series with a sulfamide group resulted in improved physicochemical properties generating analogs with enhanced inhibition in cell-based and whole blood assays. (C) 2011 Elsevier Ltd. All rights reserved.
Manganese-Catalyzed Oxidative Azidation of Cyclobutanols: Regiospecific Synthesis of Alkyl Azides by CC Bond Cleavage
作者:Rongguo Ren、Huijun Zhao、Leitao Huan、Chen Zhu
DOI:10.1002/anie.201506578
日期:2015.10.19
azidation of cyclobutanols is described. A wide range of primary, secondary, and tertiary alkyl azides were generated in synthetically useful yields and exclusive regioselectivity. Aside from linear alkyl azides, otherwise elusive medium‐sized cyclicazides were also readily prepared. Preliminary mechanistic studies reveal that the reaction likely proceeds by a radical‐mediated CC bond cleavage/CN3 bond
描述了一种新型的锰催化的环丁醇的氧化叠氮化。产生了大量伯,仲和叔烷基叠氮化物,具有合成上有用的产率和唯一的区域选择性。除了线性烷基叠氮化物外,还容易制备难以捉摸的中型环状叠氮化物。初步机理研究表明,该反应可能是由自由基介导的C转入 C键裂解/ C Ñ 3键的形成通路。
Discovery of selective imidazole-based inhibitors of mammalian 15-lipoxygenase: Highly potent against human enzyme within a cellular environment
作者:David S. Weinstein、Wen Liu、Khehyong Ngu、Charles Langevine、Donald W. Combs、Shaobin Zhuang、Cindy Chen、Cort S. Madsen、Timothy W. Harper、Jeffrey A. Robl
DOI:10.1016/j.bmcl.2007.07.011
日期:2007.9
A series of 2,4,5-tri-substituted imidazoles has proven to be highly potent in inhibiting mammalian 15-lipoxygenase (15LO) with excellent selectivity over human isozymes 5- and P-12-LO. Non-symmetrical sulfamides (e.g., 21a-n) were found to be suitable replacements for the earlier arylsulfonamide-containing members of this series (e.g., 2, 14a-p). Several members of these series also demonstrated potent inhibition of human 15-LO in a cell-based assay. (c) 2007 Elsevier Ltd. All rights reserved.
Pyrazole-based sulfonamide and sulfamides as potent inhibitors of mammalian 15-lipoxygenase
作者:Khehyong Ngu、David S. Weinstein、Wen Liu、Charles Langevine、Donald W. Combs、Shaobin Zhuang、Xing Chen、Cort S. Madsen、Timothy W. Harper、Saleem Ahmad、Jeffrey A. Robl
DOI:10.1016/j.bmcl.2011.05.107
日期:2011.7
A series of inhibitors of mammalian 15-lipoxygenase (15-LO) based on a 3,4,5-tri-substituted pyrazole scaffold is described. Replacement of a sulfonamide functionality in the lead series with a sulfamide group resulted in improved physicochemical properties generating analogs with enhanced inhibition in cell-based and whole blood assays. (C) 2011 Elsevier Ltd. All rights reserved.
Manganese‐Mediated Electrooxidative Ring‐Opening Azidation of Cyclobutanol Derivatives with TMSN3
作者:Wenchao Gao、Jie Yang、Yong Teng、Wendian Li、Wenguang Li、Ting Li
DOI:10.1002/adsc.202400101
日期:——
A Mn‐electrocatalytic ring‐opening azidation of tert‐cyclobutanols has been developed. The regioselective method is applicable for the azidation of a diverse array of cyclobutanols to provide γ‐azido ketones in 23‐91% yields under chemical oxidants‐free reaction conditions. Detailed mechanistic studies suggest the process of Mn‐mediated alkoxy radical generation followed by β‐scission to form carbon‐centered