Phosphorylated hydroxyethylamines as novel inhibitors of the bacterial cell wall biosynthesis enzymes MurC to MurF
摘要:
Enzymes involved in the biosynthesis of bacterial peptidoglycan represent important targets for development of new antibacterial drugs. Among them, Mur ligases (MurC to MurF) catalyze the formation of the final cytoplasmic precursor UDP-N-acetylmuramyl-pentapeptide from UDP-N-acetylmuramic acid. We present the design, synthesis and biological evaluation of a series of phosphorylated hydroxyethylamines as new type of small-molecule inhibitors of Mur ligases. We show that the phosphate group attached to the hydroxyl moiety of the hydroxyethylamine core is essential for good inhibitory activity. The IC50 values of these inhibitors were in the micromolar range, which makes them a promising starting point for the development of multiple inhibitors of Mur ligases as potential antibacterial agents. In addition, 1-(4-methoxyphenylsulfonamido)-3-morpholinopropan-2-yl dihydrogen phosphate 7a was discovered as one of the best inhibitors of MurE described so far. (C) 2009 Elsevier Inc. All rights reserved.
Provided is a method for producing a perfluoroalkylated compound at low cost, safely and with high efficiency. A method for producing a perfluoroalkylated compound, comprising reacting a bis(perfluoroalkanoyl) peroxide with a compound having a carbon-carbon unsaturated bond and/or an aromatic ring having a hydrogen atom bonded thereto in the presence of a copper catalyst.
Superacid mediated reactions applied to 4-aminobenzofused sultams and fluorinated 4-aminobenzene sulfonamides synthesis
作者:Fei Liu、Neil Y. Musadji、Frédéric Lecornué、Marie-Paule Jouannetaud、Sébastien Thibaudeau
DOI:10.1016/j.tet.2010.06.095
日期:2010.8
A novel series of 4-aminobenzofused sultams was prepared using an efficient synthetic procedure based on superacid mediated reactions followed either by copper-catalyzed coupling or SNAr reactions. The synthetic potential of the method toward the divergent synthesis of novel potent bioactive (fluorinated) aminobenzofused sultams and fluorinated 4-aminobenzene sulfonamides was shown, making it a new
使用基于超酸介导的反应的有效合成方法,然后进行铜催化的偶联反应或S N Ar反应,制备了一系列新型的4-氨基苯并合的阿马酸。显示了该方法对新型有效的生物活性(氟化)氨基苯并融合的阿马苏丹胺和氟化的4-氨基苯磺酰胺的合成潜力,使其成为合成生物活性4-氨基苯磺酰胺家族中大量化合物的新有价值的工艺。
Regioselective Rhodium(I)-Catalyzed Hydroarylation of Protected Allylic Amines with Arylboronic Acids
作者:Gavin Chit Tsui、Frederic Menard、Mark Lautens
DOI:10.1021/ol100974f
日期:2010.6.4
A novel regioselective rhodium(I)-catalyzed hydroarylation of unactivated alkenes with arylboronicacids is described. The catalytic system employs [Rh(COD)OH]2 and BINAP to effect the addition of various arylboronicacids to protected allylic amines. The regioselectivity was found to be highly dependent on the protecting group, favoring the linear addition product with up to 92% yield and >20:1 regioselectivity
Synthesis of substituted 3-arylpiperidines and 3-arylpyrrolidines by radical 1,4 and 1,2-aryl migrations
作者:Alexandru Gheorghe、Béatrice Quiclet-Sire、Xavier Vila、Samir Z. Zard
DOI:10.1016/j.tet.2007.04.091
日期:2007.7
A route to 3-arylpiperidines and 3-arylpyrrolidines involving radical 1,4- and 1,2-aryl migrations has been explored. For the piperidines, the first route requires a xanthate addition to an N-allylarylsulfonamide, followed by acetylation and treatment with lauroyl peroxide to give the corresponding 1,4-aryl transfer product. This compound can be converted into the desired piperidine derivative following
Silylcupration and Copper-Catalyzed Carbomagnesiation of Ynamides: Application to Aza-Claisen Rearrangement
作者:Hiroto Yasui、Hideki Yorimitsu、Koichiro Oshima
DOI:10.1246/bcsj.81.373
日期:2008.3.15
Treatment of ynamides with silylcopper reagents resulted in silylcupration to afford (E)-β-silylenamides, after protonolysis, in good yields with high regio- and stereoselectivity. Reaction of ynamides having an allyl group on the nitrogen with Grignard reagents in the presence of a copper catalyst resulted in carbomagnesiation across the alkynyl unit and subsequent heating provided 4-pentenenitriles via aza-Claisen rearrangement.