Synthesis and anti-neuroinflammatory activity of N-heterocyclic analogs based on natural biphenyl-neolignan honokiol
摘要:
Novel isoxazole and pyrazole analogs based on natural biphenyl-neolignan honokiol were synthesized and evaluated for their inhibitory activities against nitric oxide production in lipopolysaccharide-activated BV-2 microglial cells. The isoxazole skeleton was constructed via nitrile oxide cycloaddition from oxime 3 and pyrazole was generated by condensation of 4-chromone and alkylhydrazine. Among the analogs, 13b and 14a showed stronger inhibitory activities with IC50 values of 8.9 and 1.2 mu M, respectively, than honokiol.
An efficient one-pot synthesis of 3-aryl-5-methylisoxazoles from aryl aldehydes
摘要:
An efficient protocol for the one-pot preparation of alkyl 3-aryl-5-methylisoxazole-4-carboxylates from aryl aldehydes is described. This method is readily amenable to the large scale preparation of isoxazoles as well as the parallel synthesis of isoxazole libraries. (C) 2011 Elsevier Ltd. All rights reserved.
An efficient one-pot synthesis of 3-aryl-5-methylisoxazoles from aryl aldehydes
作者:Shirong Zhu、Shuhao Shi、Samuel W. Gerritz
DOI:10.1016/j.tetlet.2011.05.104
日期:2011.8
An efficient protocol for the one-pot preparation of alkyl 3-aryl-5-methylisoxazole-4-carboxylates from aryl aldehydes is described. This method is readily amenable to the large scale preparation of isoxazoles as well as the parallel synthesis of isoxazole libraries. (C) 2011 Elsevier Ltd. All rights reserved.
Discovery of 3-Amino-4-Chlorophenyl P1 as a novel and potent benzamidine mimic via solid-phase synthesis of an isoxazoline library
作者:Patrick Y.S. Lam、Jessica J. Adams、Charles G. Clark、W.Jason Calhoun、Joseph M. Luettgen、Robert M. Knabb、Ruth R. Wexler
DOI:10.1016/s0960-894x(03)00130-6
日期:2003.5
In an effort to identify orally bioavailable factor Xa inhibitors, two isoxazolines libraries were prepared to scan for novel P1 ligands. From this work, 4-chloro-3-aniline was identified as a novel and potent benzamidine mimic. (C) 2003 Elsevier Science Ltd. All rights reserved.
Design and synthesis of 4-O-methylhonokiol analogs as inhibitors of cyclooxygenase-2 (COX-2) and PGF1 production
A series of novel 4-O-methylhonokiol analogs were synthesized in light of revealing structure-activity relationship for inhibitory effect of COX-2 enzyme. The key strategy of the molecular design was oriented towards modification of the potential metabolic soft spots (e. g., phenol and olefin) or by altering the polar surface area via incorporating heterocycles such as isoxazole and triazole. Most of all exhibited the inhibitory effects on COX-2 and PGF(1) production but not macrophage NO production. Especially, aryl carbamates 10 and 11 exhibited more potent inhibitory activity against COX-2 and PGF(1) production. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.
Synthesis and anti-neuroinflammatory activity of N-heterocyclic analogs based on natural biphenyl-neolignan honokiol
作者:Yue Yuan、Lalita Subedi、Daesung Lim、Jae-Kyung Jung、Sun Yeou Kim、Seung-Yong Seo
DOI:10.1016/j.bmcl.2018.11.014
日期:2019.1
Novel isoxazole and pyrazole analogs based on natural biphenyl-neolignan honokiol were synthesized and evaluated for their inhibitory activities against nitric oxide production in lipopolysaccharide-activated BV-2 microglial cells. The isoxazole skeleton was constructed via nitrile oxide cycloaddition from oxime 3 and pyrazole was generated by condensation of 4-chromone and alkylhydrazine. Among the analogs, 13b and 14a showed stronger inhibitory activities with IC50 values of 8.9 and 1.2 mu M, respectively, than honokiol.