Radical Sequential Processes Promoted by 1,5-Radical Translocation Reaction: Formation and [3 + 2] Anulation of Alkenesulfanyl Radicals
作者:Laura Capella、Pier Carlo Montevecchi、Maria Luisa Navacchia
DOI:10.1021/jo960279v
日期:1996.1.1
Radicaladdition of 2-substituted ethanethiols 1-5 to alkyl-, dialkyl-, and phenylacetylenes affords the corresponding beta-sulfanylalkenyl radicals, which can undergo 1,5-radical translocation (RT reaction) in competition with intermolecular hydrogen abstraction (HA reaction). The RT reaction is the first step of a sequential radical process leading to alkenesulfanyl radicals through an "intermolecular
Novel reaction patterns of carbon disulfide with organolithium compounds via cleavage of CS bonds or via cycloaddition reactions
作者:Jinglong Chen、Qiuling Song、Zhenfeng Xi
DOI:10.1016/s0040-4039(02)00581-6
日期:2002.5
Carbon disulfide reacted at room temperature with 1,4-dilithio-1,3-diene species via cleavage of the CS double bonds affording multiply substituted thiophenes or via cycloaddition reactions affording thiopyran-2-thiones.
Selective cyclometalation of disubstituted acetylenes and ethylene with diethylmagnesium and ethylmagnesium halides in the presence of zirconium complexes
作者:R. M. Sultanov、V. V. Vasil’ev、U. M. Dzhemilev
DOI:10.1134/s1070428010030097
日期:2010.3
Catalytic cyclometalation of disubstituted acetylenes and ethylene with ethylmagnesium halides EtMgHlg (Hlg = Cl, Br) and diethylmagnesium Et2Mg in the presence of Cp2ZrCl2 gave tetrasubstituted magnesacyclopenta-2,4-dienes and disubstituted magnesacyclopent-2-enes. A probable scheme of formation of cyclic unsaturated organomagnesium compounds was proposed, according to which the reactive intermediates
Synthesis of cyclic 1,4-disulfides and alkylthiophenes by catalytic thiacyclization of acetylenes with sulfur
作者:U. M. Dzhemilev、N. Z. Baibulatova、T. K. Tkachenko、R. V. Kunakova、L. M. Khalilov、A. A. Berg
DOI:10.1007/bf00958053
日期:1989.3
Cu-Catalyzed Double S-Alkenylation of Potassium Sulfide: A Highly Efficient Method for the Synthesis of Various Thiophenes
作者:Wei You、Xiaoyu Yan、Qian Liao、Chanjuan Xi
DOI:10.1021/ol101619s
日期:2010.9.3
An efficient synthetic approach to variously substituted thiophenes has been developed through copper-catalyzed tandem S-alkenylation of potassium sulfide with 1,4-dilodo-1,3-dienes.