Oxidative Generation of Thioalkyl Cations from 2-Tributylstannyl-1,3-dithianes and 1-(Tributylstannyl)alkyl Sulfides and Their Reactions with Olefinic Nucleophiles
作者:Koichi Narasaka、Noriyoshi Arai、Tatsuo Okauchi
DOI:10.1246/bcsj.66.2995
日期:1993.10
2-Tributylstannyl-1,3-dithianes and 1-(tributylstannyl)alkyl sulfides are oxidized with ammoniumhexanitratocerate(IV) or ferrocenium hexafluorophosphate to generate their cation radicals, which dissociate into the carbocations and tributylstannyl radical. The carbocations thus generated react with olefinic nucleophiles to afford the corresponding addition products in good yield.
Generation of Cation Radicals from 2-Tributylstannyl-1,3-dithianes and Their Reaction with Olefins
作者:Koichi Narasaka、Tatsuo Okauchi、Noriyoshi Arai
DOI:10.1246/cl.1992.1229
日期:1992.7
Oxidation of 2-tributylstannyl-1,3-dithianes with metallic oxidants generates reactive species such as 1,3-dithian-2-yl radical and/or cation by eliminating the stannyl group. Those intermediates react with olefins to give the intermolecular addition products.
On the synthesis of β-keto-1,3-dithianes from conjugated ynones catalyzed by magnesium oxide
作者:Chunli Xu、Jonathan K. Bartley、Dan I. Enache、David W. Knight、Matthew Lunn、Martin Lok、Graham J. Hutchings
DOI:10.1016/j.tetlet.2008.02.030
日期:2008.4
Mao was used for the first time as a heterogeneous basic catalyst to synthesize beta-keto-1,3-dithianes, potentially useful synthetic intermediates, from conjugated ynones and ynoates. (C) 2008 Elsevier Ltd. All rights reserved.