A facile and efficient visible-light-driven method has been developed to construct sulfoxides via oxidative coupling of aryldiazo sulfones with thiolsusing the O2 in air as the oxidant. This reaction could be performed at room temperature under catalyst- and additive-free conditions. The present methodology offers a mild and environmentally benign approach to obtain a library of sulfoxides in good
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;
<i>Meta</i>-
and <i>Para</i>-Difunctionalization of Arenes
via an <i>Ortho</i>-Magnesiation and a Subsequent
Sulfoxide-Magnesium Exchange
作者:Laurin Melzig、Christian Rauhut、Paul Knochel
DOI:10.1055/s-0028-1087984
日期:——
Highly functionalized 1,2,4-trisubstituted arenes can be prepared on large scale by a two-step sequence, triggered by an aryl sulfoxide group. In the first step, the sulfoxide moiety acts as a metalation directing group, allowing a smooth magnesiation with tmpMgCl˙LiCl. After a quenching reaction with an electrophile, the resulting sulfoxide is converted with i-PrMgCl˙LiCl into a second magnesium
Preparation process of fluorine subsituted aromatic compound
申请人:Mitsui Chemicals, Inc.
公开号:EP1013629A1
公开(公告)日:2000-06-28
A preparation process of a fluorine substituted aromatic compound comprising reacting an alkali metal or alkali earth metal salt of an aromatic compound having a hydroxy group with an organic fluorinating agent is disclosed. As a representative fluorinating agent, a bis-dialkylaminodifluoromethane compound, for example, 2,2'-difluoro-1,3-dimethylimidazolidine, is exemplified.
According to the process, an industrially useful fluorinated aromatic compound, for example, a fluorobenzene, a fluorine substituted benzophenone, a fluorine substituted diarylsulfone can be prepared with ease in economy without specific equipment.