Synthesis and cyclooxygenase inhibition of various (aryl-1,2,3-triazole-1-yl)-methanesulfonylphenyl derivatives
摘要:
A series of 1,4- and 1,5-diaryl substituted 1,2,3-triazoles was synthesized by either Cu( I)-catalyzed or Ru( II)-catalyzed 1,3-dipolar cycloaddition reactions between 1-azido-4-methane-sulfonylbenzene 9 and a panel of various para-substituted phenyl acetylenes ( 4- H, 4- Me, 4- OMe, 4- NMe2, 4- Cl, 4- F). All compounds were used in in vitro cyclooxygenase ( COX) assays to determine the combined electronic and steric effects upon COX-1 and COX-2 inhibitory potency and selectivity. Structure-activity relationship studies showed that compounds having a vicinal diaryl substitution pattern showed more potent COX-2 inhibition (IC50 = 0.03-0.36 mu M) compared to their corresponding 1,3-diaryl-substituted counterparts (IC50 = 0.15 to > 10.0 mu M). In both series, compounds possessing an electron-withdrawing group ( Cl and F) at the para-position of one of the aryl rings displayed higher COX-2 inhibition potency and selectivity as determined for compounds containing electron-donating groups ( Me, OMe, NMe2). The obtained data show, that the central carbocyclic or heterocyclic ring system as found in many COX-2 inhibitors can be replaced by a central 1,2,3-triazole unit without losing COX-2 inhibition potency and selectivity. The high COX-2 inhibition potency of some 1,2,3-triazoles having a vicinal diaryl substitution pattern along with their ease in synthesis through versatile Ru( II)-catalyzed click chemistry make this class of compounds interesting candidates for further design and synthesis of highly selective and potent COX-2 inhibitors. (c) 2009 Elsevier Ltd. All rights reserved.
Iridium(III)-Catalyzed Direct C-7 Amination of Indolines with Organic Azides
作者:Kwangmin Shin、Sukbok Chang
DOI:10.1021/jo5018475
日期:2014.12.19
Iridium-catalyzed regioselective C-7 amination of indolines has been achieved with organic azides as a facile nitrogen source. The developed procedure is convenient to perform even at roomtemperature and applicable to a wide range of substrates with high catalytic activity. Various types of organic azides (sulfonyl, aryl, and alkyl derivatives) were all successfully reacted under the present conditions
derivatives were designed and synthesized in a facile syntheticapproach in order to produce selective COX-2 inhibitor. These series of derivatives were synthesized by different reactions like Vilsmeier–Haack reaction and click reaction. In vitro COX-1 and COX-2 inhibition studies showed that five compounds were potent and selectiveinhibitors of the COX-2 isozyme with IC50 values in 0.551–0.002 μM
Copper(II)-Catalyzed Conversion of Aryl/Heteroaryl Boronic Acids, Boronates, and Trifluoroborates into the Corresponding Azides: Substrate Scope and Limitations
作者:Courtney Aldrich、Kimberly Grimes、Amol Gupte
DOI:10.1055/s-0029-1218683
日期:2010.5
incorporating B-C(sp³) bonds are unreactive under the reaction conditions. The copper(II)-catalyzed boronic acid-azide coupling reaction is further extended to both boronate esters and potassium organotrifluoroborate salts. The method described herein complements existing procedures for the preparation of arylazides from the respective amino, triazene, and halide derivatives and we expect that it will greatly
我们报告了铜 (II) 催化的有机硼化合物转化为相应的叠氮化物衍生物。评估了一系列系统的苯基硼酸衍生物,以检查取代基的空间和电子效应对反应产率以及官能团兼容性的重要性。杂环底物也被证明参与了这种温和的反应,而结合了 BC( sp³) 键在反应条件下不反应。铜 (II) 催化的硼酸-叠氮化物偶联反应进一步扩展到硼酸酯和有机三氟硼酸钾盐。本文描述的方法补充了从各自的氨基、三氮烯和卤化物衍生物制备芳基叠氮化物的现有程序,我们预计它将极大地促进铜和钌催化的叠氮化物-炔环加成反应,以制备多种功能化的 1-芳基-或1-杂芳基-1,2,3-三唑衍生物。 叠氮化物 - 有机硼化合物 - 铜催化 - 1,2,3-三唑
[EN] INHIBITORS OF CD40-CD154 BINDING<br/>[FR] INHIBITEURS DE LIAISON CD40-CD154
申请人:TONIX PHARMACEUTICALS HOLDING CORP
公开号:WO2020210831A1
公开(公告)日:2020-10-15
Disclosed herein are compounds including pharmaceutically acceptable salts, esters, prodrugs, hydrates and tautomers thereof which modulate the interactions of CD-40-CD40L. The compounds are useful for treating, ameliorating or preventing an autoimmune disease, inflammatory disease, or other immune-related disease in a patient in need of treatment.
A useful method for the synthesis of aryl azides via SNAr reaction of phenol derivatives using diphenyl phosphorazidate (DPPA) as an azidationreagent was developed. Various phenol derivatives bearing electron-withdrawing groups were converted into the corresponding aryl azides in a single step. This method is easy to perform and enables the preparation of aryl azides without the use of explosive azide