Acid-Catalyzed Synthesis of Aryl[4,5]isothiazoles through a Sulfenic Acid Pathway
作者:Hong Yuan、Zhihua Sun
DOI:10.1055/s-0039-1690201
日期:2019.10
A new method to efficiently prepare 3-substituted aryl[4,5]isothiazoles by simply heating the starting materials with a catalytic amount of p-toluenesulfonic acid in toluene is reported. This simple procedure is well suitable for a variety of substrates that can tolerate substitution changes in the fusing aromatic ring, as well as at the 3-position. Substituted aryl rings of varying electronic properties
Metal-free visible light-promoted synthesis of isothiazoles: a catalytic approach for N–S bond formation from iminyl radicals under batch and flow conditions
applying photoredoxcatalysis. This simple strategy features mild conditions, broad scope and wide functional group tolerance representing a new enviromentally friendly option to prepare these highly valuable heterocycles. Furthermore, the synthetic value of the method is highlighted by the preparation of a natural product derivative and the implementation of the reaction in a continuousflow setup.
Facile Preparation of 3-Substituted Benzisothiazoles from <i>o</i>-Mercaptoacylphenones
作者:Nelmi O. Devarie-Baez、Ming Xian
DOI:10.1021/ol9028447
日期:2010.2.19
A synthesis of 3-substituted benzisothiazoles starting from readily available o-mercaptoacylphenones is presented. The key cyclization step features a mild S-nitrosation and its succeeding intramolecular aza-Wittig reaction leading to the construction of the title compounds.
IRIDIUM COMPLEX AND ORGANIC ELECTROLUMINESCENCE DEVICE USING THE SAME
申请人:YEN FENG-WEN
公开号:US20200157129A1
公开(公告)日:2020-05-21
The present invention discloses an iridium complex represented by the following formula (1) and an organic electroluminescence device using the iridium complex as a phosphorescent dopant material. The phosphorescent dopant material may lower a driving voltage and power consumption and increase a current efficiency and half-life of the organic electroluminescence device.
The same definition as described in the present invention.