Visible-Light-Driven Silver-Catalyzed One-Pot Approach: A Selective Synthesis of Diaryl Sulfoxides and Diaryl Sulfones
作者:Dong Hyuk Kim、Juyoung Lee、Anna Lee
DOI:10.1021/acs.orglett.7b03901
日期:2018.2.2
An efficient one-pot approach for the synthesis of diaryl sulfoxides and diaryl sulfonesusing aryl thiols and aryl diazonium salts was developed. The use of a visible-light-driven silver catalysis and the subsequent singlet-oxygen-induced oxidation enabled selective synthesis of sulfoxides and sulfones in the absence of a photocatalyst. The reactions were carried out under mild reaction conditions;
Modulation of photochemical oxidation of thioethers to sulfoxides or sulfones using an aromatic ketone as the photocatalyst
作者:Bin Zhao、Gerald B. Hammond、Bo Xu
DOI:10.1016/j.tetlet.2021.153376
日期:2021.10
We have developed an eco-friendly and chemo-selective photocatalytic synthesis of sulfoxides or sulfones via oxidation of sulfides (thioethers) at ambient temperature using air or O2 as the oxidant. An inexpensive thioxanthone was used as the photocatalyst. Our method offers excellent chemical yields and good functional group tolerance. The hydrogen bonding between hexafluoro-2-propanol (HFIP) and
我们开发了一种环保且化学选择性的光催化合成亚砜或砜,通过在环境温度下使用空气或 O 2作为氧化剂氧化硫化物(硫醚)。廉价的噻吨酮被用作光催化剂。我们的方法提供了出色的化学产率和良好的官能团耐受性。六氟-2-丙醇 (HFIP) 和亚砜之间的氢键可能在最大限度地减少亚砜的过度氧化方面发挥重要作用。
Method for acylation or sulphonylation of an aromatic compound
申请人:Rhodia Chimie
公开号:US06348631B1
公开(公告)日:2002-02-19
The present invention relates to a process for the acylation or sulphonylation of an aromatic compound.
More particularly, the invention relates to a process for the acylation or sulphonylation of an activated or deactivated aromatic compound.
The invention is applied to the preparation of aromatic ketones or sulphones.
The process for the acylation or sulphonylation of an aromatic compound which consists in reacting at least one aromatic compound with an acylating or sulphonylating agent, in the presence of a Friedel-Crafts catalyst is characterized in that the acylation or sulphonylation reaction is carried out in liquid phase under microwave irradiation.
An efficient cross-coupling of sodium or lithium sulfinates with aryl iodides, using a combination of nickel and photoredoxcatalysis, is described. The dual catalyst system enables a versatile synthesis of aryl sulfones at roomtemperature in good yields and displays a broad functional group compatibility. The potential utility of this method in the late-stage diversification of complex molecules
An efficient method for aromatic Friedel–Crafts alkylation, acylation, benzoylation, and sulfonylation reactions
作者:Ravi P Singh、Rajesh M Kamble、Kusum L Chandra、P Saravanan、Vinod K Singh
DOI:10.1016/s0040-4020(00)01005-x
日期:2001.1
Aromatic electrophilic substitution reactions such as alkylation, acylation, benzoylation, and sulfonylation were studied in the presence of a catalytic amount of Cu(OTf)2 and Sn(OTf)2. Cu(OTf)2 was very efficient for alkylation, acylation, and benzoylation reactions. However, in case of sulfonylation reactions, Sn(OTf)2 gave better results.