Copper-catalyzed selective ortho-arylations of 2-naphthol and phenol derivatives with diaryliodonium salts
摘要:
The selective arylations of 2-naphthol and phenol derivatives catalyzed by Cu(OTf)(2) with using diaryliodonium(III) salts have been developed. With this method, biaryls bearing hydroxyl groups can be easily accessed in moderate to good yields. Additionally, this protocol provided an alternative for the preparation of 3-arylated binaphthalene derivatives. (C) 2015 Elsevier Ltd. All rights reserved.
Mechanisms of the Photochemical Rearrangement of Diphenyl Ethers
作者:Naoki Haga、Hiroaki Takayanagi
DOI:10.1021/jo9517196
日期:1996.1.1
The mechanism of the photochemical rearrangement of diphenyl ether (1a) was studied. Irradiation of 1a in ethanol gave 2-phenylphenol (2, 42%) and 4-phenylphenol (3, 11%) as rearrangement products, in addition to phenol (4, 30%) and benzene (5, 25%) as diffusion products. Cross-coupling experiments employing [(2)H(10)]1a demonstrated that the formation of 2- and 4-phenylphenol was an intramolecular
Electrochemical Cross‐Dehydrogenative Coupling between Phenols and β‐Dicarbonyl Compounds: Facile Construction of Benzofurans
作者:Yandong Wang、Bailin Tian、Mengning Ding、Zhuangzhi Shi
DOI:10.1002/chem.201904750
日期:2020.4
required to facilitate the dehydrogenation and dehydration processes. The key factor in the success was the use of n Bu 4 NBF 4 as the electrolyte and hexafluoroisopropanol (HFIP) as the solvent, which play key roles in the cyclocondensation step. This electrolysis is scalable and can be used as a keystep in drug synthesis. On the basis of the several experimental results, the mechanism, particularly
制备电化学合成是建立绿色可持续工艺的理想方法。与传统的化学合成方法相比,有机化学策略的主要优点是避免了试剂浪费和温和的反应条件。在此,已经开发了在不分开的电解条件下,酚与β-二羰基化合物之间的分子间交叉脱氢偶联(CDC),以构建各种苯并呋喃。过渡金属或外部化学氧化剂都不需要以促进脱氢和脱水过程。成功的关键因素是使用n Bu 4 NBF 4作为电解质,使用六氟异丙醇(HFIP)作为溶剂,它们在环缩合步骤中起关键作用。这种电解是可扩展的,可以用作药物合成中的关键步骤。
[EN] DERIVATIVES OF 6-SUBSTITUTED TRIAZOLOPYRIDAZINES AS REV-ERB AGONISTS<br/>[FR] DÉRIVÉS DE TRIAZOLOPYRIDAZINES 6-SUBSTITUÉES EN TANT QU'AGONISTES DE REV-ERB
申请人:GENFIT
公开号:WO2013045519A1
公开(公告)日:2013-04-04
The present invention provides novel 6-substituted [1,2,4]triazolo[4,3-b]pyridazines that are agonists of Rev-Erb. These compounds, and pharmaceutical compositions comprising the same, are suitable means for treating any disease wherein the activation of Rev-Erb has therapeutic effects, for instance in inflammatory and circadian rhythm-related disorders or cardiometabolic diseases.
Dearomatization Approach to 2-Trifluoromethylated Benzofuran and Dihydrobenzofuran Products
作者:David T. Smith、Edon Vitaku、Jon T. Njardarson
DOI:10.1021/acs.orglett.7b01479
日期:2017.7.7
phenoxonium intermediate, a critical choice of solvent, and reagent addition order. The fluorinated dihydrobenzofuran product can be transformed into dihydrobenzofuran and benzofuran products decorated with a 2-trifluoromethyl group. The 3-trifluoromethylacyl substituted benzofurans rapidly form hydrates, which can be reduced to the corresponding alcohols.
Synthesis of Dibenzopyranones through Palladium-Catalyzed Directed C-H Activation/Carbonylation of 2-Arylphenols
作者:Shuang Luo、Fei-Xian Luo、Xi-Sha Zhang、Zhang-Jie Shi
DOI:10.1002/anie.201304295
日期:2013.9.27
Dibenzopyranones were synthesized by a palladium‐catalyzed phenol‐directed C–H activation/carbonylation of 2‐phenylphenol derivatives in the presence of CO. Pd(OAc)2 was used as a catalyst and Cu(OAc)2 as a catalytic oxidant in the presence of air.