Conjugate Addition of α-Sulfur-substituted Alkylstannanes to α,β-Unsaturated Ketones Mediated by a Copper(II) Triflate and Chlorotrimethylsilane Combination
Configurational stability of chiral organolithium compounds on the time scale of their addition to aldehydes
作者:Reinhard W. Hofmann、Manfred Julius、Fabrice Chemla、Thomas Ruhland、Gerlinde Frenzen
DOI:10.1016/s0040-4020(01)90457-0
日期:1994.1
A test based on kinetic resolution has been applied to the α-bromo-, α-phenylseleno- and α-phenylthio-alkyl-lithium compounds 1, which shows that addition of these species to the chiral aldehyde 6 occurs faster than enantiomer equilibration of the organolithiumcompounds.
Copper(II) Triflate-mediated Addition Reaction of α-Sulfurated Alkylstannanes to Imines: Facile Synthesis of Vicinal-amino Sulfides
作者:Hirotaka Kagoshima、Naoshi Takahashi
DOI:10.1246/cl.2004.962
日期:2004.8
In the presence of copper(II) triflate, the addition reaction of α-sulfurated alkylstannanes to imines proceeded smoothly to give the corresponding vicinal-amino sulfides in good yields.
在三氟甲磺酸铜 (II) 存在下,α-硫化烷基锡烷与亚胺的加成反应顺利进行,以良好的收率得到相应的邻氨基硫化物。
A Convenient, Catalyst-free Cross-coupling Reaction of α-Sulfur-substituted Alkylstannanes with Acid Chlorides Leading to α-Sulfur-substituted Ketones
作者:Hirotaka Kagoshima、Naoshi Takahashi
DOI:10.1246/cl.2007.14
日期:2007.1
A thermal cross-coupling reaction of α-sulfur-substituted alkylstannanes with acid chlorides is described. A range of substrates can be used for the present reaction and the reaction proceeds by just mixing two components under reflux in mesitylene to give the corresponding α-sulfur-substituted ketones in good yields.
Copper-catalyzed cross-coupling reaction of α-sulfur-substituted alkylstannanes with acid chlorides
作者:Hirotaka Kagoshima、Naoshi Takahashi
DOI:10.1016/j.tetlet.2013.06.088
日期:2013.8
Copper compounds were found to catalyze the cross-coupling reaction of a-sulfur-substituted alkylstannanes with acid chlorides. Under the optimized conditions (CuF2 (1 mol %), 1,4-dioxane, 102 degrees C), various substrates coupled to afford the corresponding a-sulfur-substituted ketones in good yields. (C) 2013 Elsevier Ltd. All rights reserved.
Conjugate Addition of α-Sulfur-substituted Alkylstannanes to α,β-Unsaturated Ketones Mediated by a Copper(II) Triflate and Chlorotrimethylsilane Combination
作者:Hirotaka Kagoshima、Takeshi Yahagi
DOI:10.1246/cl.130284
日期:2013.8.5
The copper(II) triflate and chlorotrimethylsilane combination was found to be effective for the conjugate addition of α-sulfur-substituted alkylstannanes to α,β-unsaturated ketones. Thus, the corresponding γ-sulfur-substituted ketones were obtained in good yields.