Catalytic Undirected Intermolecular C–H Functionalization of Arenes with 3-Diazofuran-2,4-dione: Synthesis of 3-Aryl Tetronic Acids, Vulpinic Acid, Pinastric Acid, and Methyl Isoxerocomate
作者:Amarender Manchoju、Sunil V. Pansare
DOI:10.1021/acs.orglett.6b03087
日期:2016.11.18
A variety of 3-aryl tetronicacids have been synthesized by an undirected, intermolecular C–H functionalization of arenes with 3-diazofuran-2,4-dione. This methodology featured as a key step in the synthesis of a series of naturally occurring 3-aryl-5-arylidene tetronicacids (pulvinates) from commercially available tetronicacid. Salient features of the pulvinic acidsynthesis include a one-step,
3-Arylfuran-2(5H)-one derivatives show good antibacterial activity and were determined as tyrosyl-tRNA synthetase (TyrRS) inhibitors. In a systematic medicinal chemistry exploration, we demonstrated chemical opportunities to treat infections caused by Helicobacter pylori. Twenty 3-arylfuran-2(5H)-ones were synthesized and evaluated for anti-H. pylori, antioxidant and anti-urease activities which are closely interconnected with H. pylori infection. The results displayed that some of the compounds show excellent antioxidant activity, and good anti-H. pylori and urease inhibitory activities. Out of these compounds, 3( 3-methylphenyl) furan-2(5H)-one (b9) showed the most potent antioxidant activity (IC50 = 8.2 mu M) and good anti-H. pylori activity (MIC50 = 2.6 mu g/mL), and it can be used as a good candidate for discovering novel anti-gastric ulcer agent. (C) 2015 Elsevier Ltd. All rights reserved.