Benzyne-induced ring opening reaction of thiiranes. Efficient synthesis of phenyl vinyl sulfides
作者:Juzo Nakayama、Satoshi Takeue、Masamatsu Hoshino
DOI:10.1016/s0040-4039(01)81261-2
日期:1984.1
A series of thiiranes react with benzyne to provide an efficient synthesis of phenyl vinyl sulfides. The reaction is stereospecific, thus producing cis-(phenylthio)-stilbene from cis-2,3-diphenylthiirane and trans-(phenylthio)stilbene from trans-2,3-diphenylthiirane.
Bis(trimethylsilyl)selenide in the Selective Synthesis of β-Hydroxy, β-Mercapto, and β-Amino Diorganyl Diselenides and Selenides Through Ring Opening of Strained Heterocycles
dialkyl diselenides and selenides is described through reaction of bis(trimethylsilyl)selenide with epoxides, thiiranes, and aziridines catalyzed by tetrabutylammonium fluoride. Selective formation of a wide variety of β-hydroxy, β-mercapto, and β-amino diselenides and selenides is achieved by controlling the reaction conditions in the regioselective attack of the silylselenide onto the ring-strained
Copper-Catalyzed Oxyalkynylation of C–S Bonds in Thiiranes and Thiethanes with Hypervalent Iodine Reagents
作者:Julien Borrel、Guillaume Pisella、Jerome Waser
DOI:10.1021/acs.orglett.9b04157
日期:2020.1.17
We report the oxyalkynylation of thiiranes and thietanes using ethynylbenziodoxolonereagents (EBXs) to readily access functionalized building blocks bearing an alkynyl, a benzoate, and an iodide group. The reaction proceeds with high atom efficiency most likely through an alkynyl-episulfonium intermediate. The transformation is copper-catalyzed and compatible with a large array of thiiranes and thietanes
The Synthesis of Dihydro-2(3<i>H</i>)-thiophenone Derivatives
作者:Yoichi Taguchi、Yasuo Suhara
DOI:10.1246/bcsj.59.2321
日期:1986.7
one derivatives. Although the reaction of an alkyl-substituted thiirane with 5 selectively gave a product formed by an attack of a carbanion at the less-hindered carbon of the thiirane ring, the major product of the reaction of 2-phenylthiirane with 5 was an isomer formed by an attack at the more hindered carbon of the thiirane ring. The reaction of 4 with ethyl acetoacetate gave 3-acetyl-5,5-dime
The reaction of 2,2-dimethylthiirane with carbon disulfide in the presence of triethylamine was accelerated under high pressure to give 4,4-dimethyl-1,3-dithiolane-2-thione nearly quantitatively. The activation volume of this reaction at 40 °C was estimated to be −41 ml mol−1. The rate of the reaction was proportional to the amount of triethylamine when a limited amount of triethylamine was used. The reaction of 2-methylthiirane, 2-hexylthiirane, 1,2-epithiocyclohexane, and 2-phenylthiirane with carbon disulfide gave the corresponding 1,3-dithiolane-2-thione derivatives in good yields. 2-Chloromethylthiirane was less reactive to carbon disulfide than other thiiranes under high pressure. Tertiary amines such as N,N-dimethylethylamine, pyridine, and N-methylmorpholine were good catalysts of the reaction.