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
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.
Synthesis of 3-Substituted Aryl[4,5]isothiazoles through an All-Heteroatom Wittig-Equivalent Process
作者:Fanghui Xu、Yuan Chen、Erkang Fan、Zhihua Sun
DOI:10.1021/acs.orglett.6b01338
日期:2016.6.3
Extending the previous use of tert-butyl sulfoxide as the sulfinyl source, intramolecular sulfinylation of sulfonamides was successfully performed. The resulting sulfinimides were not isolated and instead were believed to go through an all-heteroatom Wittig-equivalent process to eventually afford aryl[4,5]isothiazoles in high yields.