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。
Synthesis of allyl sulfoxides from allylsilanes via silyl sulfinates
作者:Agnese Stikute、Vilnis Peipiņš、Māris Turks
DOI:10.1016/j.tetlet.2015.06.018
日期:2015.7
Allylsilanes underwent sila-ene reaction with sulfur dioxide in the presence of Lewis acid catalysts. The obtained Vogel’s silyl sulfinates were found to act as sulfinyl transfer agents in reactions with aryl, heteroaryl, alkyl, and allyl Grignard reagents proceeding with the expulsion of the trialkylsilyloxy group to give allyl sulfoxides in up to 83% yield. The nucleophilic attack of Grignard reagents
Stereospecific trisubstituted olefin synthesis via interconversion of allylic sulphoxides and sulphenates
作者:Paul A. Grieco
DOI:10.1039/c3972000702a
日期:——
α-Substituted methallyl p-tolyl sulphoxides undergo a [2,3]-sigmatropic rearrangement to allylic sulphenate esters (II) which can be intercepted by suitable nucleophiles, thus providing a new stereospecific route to trisubstituted olefins.
α-Phosphoryl sulfoxides. XI. Sulfenylation of α-phosphoryl sulfoxides and a general synthesis of optically active ketene dithioacetal mono-S-oxides
作者:Marian Mikołajczyk、Wanda H. Midura、Blanka Wladislaw、Francisco C. Biaggio、Liliana Marzorati、MichałW. Wieczorek、Jarosław Błaszczyk
DOI:10.1016/s0040-4020(96)01175-1
日期:1997.2
α-phosphoryl sulfoxides 1 with S-methyl methanethiosulfonate and phenylselenenyl bromide, respectively, affording α-methylsulfenyl- and α-phenylselenenyl-α-phosphoryl sulfoxides 8 and 9 are described. Sulfenylation of (+)-(S)-dimethoxyphosphorylmethyl p-tolyl sulfoxide 2 gave a mixture of opticallyactive diastereoisomers of the sulfoxide 8a which is a key substrate in the Horner-Wittig synthesis of enantiomeric