Iodine(III)-Catalyzed Electrophilic Nitration of Phenols via Non-Brønsted Acidic NO<sub>2</sub><sup>+</sup> Generation
作者:Kevin A. Juárez-Ornelas、J. Oscar C. Jiménez-Halla、Terumasa Kato、César R. Solorio-Alvarado、Keiji Maruoka
DOI:10.1021/acs.orglett.8b04141
日期:2019.3.1
The first catalytic procedure for the electrophilic nitration of phenols was developed using iodosylbenzene as an organocatalyst based on iodine(III) and aluminum nitrate as a nitro group source. This atom-economic protocol occurs under mild, non-Brønsted acidic and open-flask reaction conditions with a broad functional-group tolerance including several heterocycles. Density functional theory (DFT)
使用碘基苯作为基于碘(III)和硝酸铝作为硝基基团来源的有机催化剂,开发了用于苯酚亲电硝化的第一个催化程序。该原子经济方案发生在温和的,非布朗斯台德酸性和开放式烧瓶反应条件下,具有宽泛的官能团耐受性,包括多个杂环。(SMD:MeCN)Mo8-HX /(LANLo8 + f,6-311 + G *)水平的密度泛函理论(DFT)计算表明反应通过阳离子途径进行,该途径有效地产生了NO 2 +离子,从而是中性条件下的硝化物种。
Friedel–Crafts acylation using bismuth triflate in [BMI][PF6]
作者:Phuong Hoang Tran、Fritz Duus、Thach Ngoc Le
DOI:10.1016/j.tetlet.2011.11.022
日期:2012.1
Bismuth trifluoromethanesulfonate was found to be a good catalyst for the Friedel–Crafts acylation. Bismuthtriflate immobilized in an ionicliquid was the most efficient catalytic system. Bismuthtriflate in [BMI][PF6] catalyzes this reaction under microwave irradiation allowing the rapid synthesis of aryl ketones in excellent yields. The catalyst system was easily recovered and reused several times
exclusive products in the oxidation of secondary alcohols. O−H bond dissociation enthalpies (BDEs) of X-NHPIs have been determined by using the EPR radical equilibration technique. BDEs increase with increasing the electron-withdrawing properties of the aryl substituent. Kinetic isotope effect studies and the increase of the substrate oxidation rate by increasing the electron-withdrawing power of the NHPI
The Catalytic Friedel-Crafts Acylation Reaction of Aromatic Compounds with Carboxylic Anhydrides Using Combined Catalyst System of Titanium(IV) Chloride Tris(trifluoromethanesulfonate) and Trifluoromethanesulfonic Acid
作者:Jun Izumi、Teruaki Mukaiyama
DOI:10.1246/cl.1996.739
日期:1996.9
Various aromatic ketones are prepared in good to high yields with carboxylic anhydrides using combined catalyst system of TiCl(OTf)3 and TfOH.
FLUORINE-CONTAINING COMPOUND, SUBSTRATE FOR PATTERN FORMATION, PHOTODEGRADABLE COUPLING AGENT, PATTERN FORMATION METHOD, AND COMPOUND
申请人:KANAGAWA UNIVERSITY
公开号:US20170158606A1
公开(公告)日:2017-06-08
A compound represented by formula (e):
where R
1
represents a branched chain or cyclic alkyl group having 3 to 10 carbon atoms, and R
f1
and R
f2
represent fluorinated alkoxy groups.