Highly chemoselective synthesis of aryl allylic sulfoxides through calcium hypobromite oxidation of aryl allylic sulfides
作者:Vittorio Pace、Laura Castoldi、Wolfgang Holzer
DOI:10.1016/j.tetlet.2011.12.046
日期:2012.2
A highlychemoselectiveoxidation of widely substituted aryl allylic sulfides, prepared by allylation of arylthioethers with KF-Celite, to the corresponding aryl allylic sulfoxide was achieved by employing calcium hypobromite. Neither over-oxidation to sulfones nor halogenation of the aromatic rings was observed. The protocol may be successfully applied for the oxidation of substituted allylic systems
Preparation of Allyl Sulfoxides by Palladium-Catalyzed Allylic Alkylation of Sulfenate Anions
作者:Guillaume Maitro、Guillaume Prestat、David Madec、Giovanni Poli
DOI:10.1021/jo061359u
日期:2006.9.1
Palladium-catalyzed allylic alkylation of sulfenate anions, generated from β-sulfinylesters by retro-Michael reaction, can take place under biphasic conditions. This new reaction provides a simple, mild, and efficient route to allyl sulfoxides in good yields.
2-difunctionalized benzenes, the sites other than its formal triple bond remain silent in typical benzyne transformations. An unprecedented aryne 1,2,3,5-tetrasubstitution was realized from 3-silylbenzyne and aryl allyl sulfoxide, the mechanistic pathway of which includes a regioselective aryne insertion into the S═O bond, a [3,6]-sigmatropic rearrangement, and a thermal aromatic 1,3-silyl migration cascade.
Aryne 1,2,3-Trifunctionalization with Aryl Allyl Sulfoxides
作者:Yuanyuan Li、Dachuan Qiu、Rongrong Gu、Junli Wang、Jiarong Shi、Yang Li
DOI:10.1021/jacs.6b06981
日期:2016.8.31
An aryne 1,2,3-trisubstitution with aryl allyl sulfoxides is accomplished, featuring an incorporation of C-S, C-O, and C-C bonds on the consecutive positions of a benzene ring. The reaction condition is mild with broad substrate scope. Preliminary mechanistic study suggests a cascade formal [2 + 2] reaction of aryne with S═O bond, an allyl S → O migration, and a Claisen rearrangement.
芳烃 1,2,3-三取代与芳基烯丙基亚砜完成,其特点是在苯环的连续位置上引入 CS、CO 和 CC 键。反应条件温和,底物范围广。初步机理研究表明,芳炔与 S=O 键发生级联形式的 [2 + 2] 反应、烯丙基 S → O 迁移和克莱森重排。
Cyclohexenynone Precursors: Preparation via Oxidative Dearomatization Strategy and Reactivity
作者:Dachuan Qiu、Jiarong Shi、Qianyu Guo、Qiuxia Xu、Baosheng Li、Yang Li
DOI:10.1021/jacs.8b08915
日期:2018.10.17
A unique approach toward the preparation of cyclohexenynone equivalents was successfully developed viaoxidative dearomatization of aryne precursors, featuring multiple functionalities on the target rings. Upon activation, these in situ formed cyclohexenynone intermediates exhibit good to excellent reactivity with various trapping agents. Moreover, an unprecedented cascade was discovered with aryl