One-pot access to sulfonylated naphthalenediols/hydroquinones from naphthols/phenols with sodium sulfinates in an aqueous medium
作者:Lingxin Meng、Ruike Zhang、Yuqiu Guan、Tian Chen、Zhiqiang Ding、Gongshu Wang、Aikebaier Reheman、Zhangpei Chen、Jianshe Hu
DOI:10.1039/d0nj05285j
日期:——
aqueous medium has been developed with up to 97% yield. The whole reaction requiring no transition-metal catalysts could proceed smoothly with hypervalent iodine compounds as the oxidant. Both naphthols and phenols were viable with inexpensive and readily available sodium sulfinates as the sulfonylation reagents under an ambient atmosphere. This procedure is scalable, and the products could be easily obtained
This paper describes a simple and practical protocol for the direct synthesis of monosulfonylated hydroquinones through a transition-metal-free cross-coupling between quinones and sulfonyl hydrazides in water. The procedure tolerates a variety of quinones and widely available sulfonyl hydrazides. (C) 2017 Elsevier Ltd. All rights reserved.
Synthesis and biological evaluation of novel sulfonyl-naphthalene-1,4-diols as FabH inhibitors
作者:Mamoun M. Alhamadsheh、Norman C. Waters、Sarbjot Sachdeva、Patricia Lee、Kevin A. Reynolds
DOI:10.1016/j.bmcl.2008.10.097
日期:2008.12
A series of analogs of 2-tosylnaphthalene-1,4-diol were prepared and were found to be potent 10-20 nM reversible inhibitors of the Escherichia coli FabH enzyme. The inhibitors were also effective but to a lesser degree (30 nM-5 mu M), against the Mycobacterium tuberculosis and Plasmodium falciparum FabH enzymes. Preliminary SAR studies demonstrated that the sulfonyl group and naphthalene-1,4 diol were required for activity against all enzymes but the toluene portion could be significantly altered and leads to either modest increases or decreases in activity against the three enzymes. The in vitro activity of the analogs against E. coli FabH parallel the in vivo activity against E. coli TolC strain and many of the compounds were also shown to have antimalarial activity against P. falciparum. (C) 2008 Published by Elsevier Ltd.
Hydroxysulfonylation of Quinones with Aryl(alkyl)sulfonyl Hydrazides for the Synthesis of 1,4-Dihydroxy-2-aryl(alkyl)sulfonylbenzenes
A copper-catalyzed procedure for the direct synthesis of 1,4-dihydroxy-2-phenylsufonylbenzenes is presented starting from simple quinones and sulfonyl hydrazides. A series of biologically useful FabH inhibitors are obtained in good yields. Both aryl and alkyl substituents are well tolerated in the reaction.