Gallium-catalyzed reductive lactonization of γ-keto acids with a hydrosilane
作者:Norio Sakai、Shuhei Horikawa、Yohei Ogiwara
DOI:10.1039/c6ra19286f
日期:——
Described herein is the GaCl3-catalyzed lactonization of γ-keto carboxylic acids in the presence of PhSiH3 leading to the direct preparation of γ-lactone derivatives. This reducing system showed a relatively wide functional group tolerance.
Indium-Catalyzed Direct Conversion of Lactones into Thiolactones and Selenolactones in the Presence of Elemental Sulfur and Selenium
作者:Norio Sakai、Shuhei Horikawa、Yohei Ogiwara
DOI:10.1055/s-0036-1591849
日期:2018.2
Abstract The direct conversion of lactones into thiolactones with elemental sulfur (S8) catalyzed by InCl3/PhSiH3 in a one-pot reaction is described. This catalytic system was successfully applied to the novel preparation of selenolactones from lactones and selenium. The direct conversion of lactones into thiolactones with elemental sulfur (S8) catalyzed by InCl3/PhSiH3 in a one-pot reaction is described
Yukhno, F. A.; Bikkulov, A. Z.; Yukhno, G. F., Journal of applied chemistry of the USSR, 1982, vol. 55, # 2, p. 377 - 380
作者:Yukhno, F. A.、Bikkulov, A. Z.、Yukhno, G. F.
DOI:——
日期:——
DIRECT SYNTHESIS OF γ-BUTYROLACTONES VIA γ-PHENYL SUBTITUTED BUTYRIC ACIDS MEDIATED BENZYL RADICAL CYCLIZATION
作者:N. O. Mahmoodi、M. Jazayri
DOI:10.1081/scc-100104057
日期:2001.1
Synthesis of several γ-butyrolactones with aromatic substitution at carbon 5 from comparative γ-aryl acids with 25–85% yield are covered. The straight oxidation in the presence of peroxydisulphate-copper(II)chloride system in aqueous medium was applied. The reaction is highly regioselective and leads exclusively to γ-butyrolactone, through stable benzylic radical intermediate.
涵盖了从比较 γ-芳基酸以 25-85% 的产率合成几种在碳 5 处具有芳族取代的 γ-丁内酯。在水性介质中,在过二硫酸盐-氯化铜 (II) 体系存在下进行直接氧化。该反应具有高度的区域选择性,并通过稳定的苄基自由基中间体专门生成 γ-丁内酯。
Indium-Catalyzed Direct Conversion of Lactones into Thiolactones Using a Disilathiane as a Sulfur Source
An indium-catalyzed reaction of lactones and a disilathiane leading to thiolactones is described. The direct synthesis of thiolactones from lactones with an appropriate sulfur source is one of the most attractive approaches in organic and pharmaceutical chemistry. In this context, we found an indium-catalyzed direct conversion of lactones into thiolactones in the presence of elemental sulfur and a