The super electrophilicity of a shelf-stable, easily prepared trifluoromethylthiolating reagent N-trifluoromethylthio-dibenzenesulfonimide 7 was demonstrated. Consistent with the theoretical prediction, 7 exhibits reactivity remarkably higher than that of other known electrophilic trifluoromethylthiolating reagents. In the absence of any additive, 7 reacted with a wide range of electron-rich arenes
Ni-Catalyzed Allylic Dearomatization Reaction of β-Naphthols with Allylic Alcohols
作者:Hui-Jun Zhang、Qing Gu、Shu-Li You
DOI:10.1021/acs.orglett.0c01109
日期:2020.4.17
Ni-catalyzed intermolecular allylic dearomatization reaction of β-naphthols with allylicalcohols was achieved. By utilizing Ni(cod)2 as a catalyst precursor, DPEphos as a ligand and 4 Å molecular sieves as additives, the dearomatization reaction of β-naphthols with aryl allylicalcohols proceeded smoothly under mild conditions, affording the desired β-naphthalenone products bearing a quaternary carbon
Asymmetric Dearomatization of β‐Naphthols through a Bifunctional‐Thiourea‐Catalyzed Michael Reaction
作者:Shou‐Guo Wang、Xi‐Jia Liu、Qun‐Chao Zhao、Chao Zheng、Shao‐Bo Wang、Shu‐Li You
DOI:10.1002/anie.201507998
日期:2015.12
An intermolecular asymmetricdearomatization reaction of β‐naphthols with nitroethylene through a chiral‐thiourea‐catalyzed Michael reaction is described. Enantioenriched functionalized β‐naphthalenones with an all‐carbon quaternary stereogenic center could thus be easily constructed from simple naphthol derivatives in good yields and excellent enantioselectivity (up to 79 % yield, 98 % ee).
A process for producing a cyclic and/or linear phosphonitrilic acid ester from a cyclic and/or linear phosphonitrile dichloride is provided, wherein the reaction time is shorter and the content of monochloro phosphazenes is very small.
When phosphonitrile dichloride is reacted with a metal arylolate and/or a metal alcoholate in the presence of a reaction solvent, a metal arylolate and/or a metal alcoholate composed of at least two different metals having different ionization energies is used and also a specific compound is used as a catalyst.
Visible-Light-Promoted Intermolecular Oxidative Dearomatization of β-Naphthols with <i>N</i>
-Hydroxycarbamates
作者:Yuan-Zheng Cheng、Kai Zhou、Min Zhu、La-Ao-Chuan Li、Xiao Zhang、Shu-Li You
DOI:10.1002/chem.201803149
日期:2018.8.27
An intermolecular oxidative dearomatization of β‐naphthols with N‐hydroxycarbamates promoted by visible light was realized by means of photogenerated β‐naphthol radical cation intermediates. With a commercially available organic dye, the naphthalenones bearing a fully substituted stereogenic center were obtained with up to 92 % yield under aerobic conditions (26 examples). In addition, the rearrangement
通过光生β-萘酚自由基阳离子中间体实现了N-羟基氨基甲酸酯在β-萘酚的分子间氧化脱芳香化作用。使用可商购的有机染料,在有氧条件下以高达92%的产率获得带有完全取代的立体异构中心的萘酮(26个实例)。此外,仅在存在Cs 2 CO 3的情况下,才可以将CO偶联产物重排至CN偶联化合物。这种转化同时提供了一种吸引人的,合成上有用的方法来获得胺类脱芳香化化合物。