An Efficient Synthesis of Unsymmetrical Sulfides Using Liquid-Liquid Phase-Transfer Catalysis
作者:Toshio Takido、Kunio Itabashi
DOI:10.1055/s-1987-28085
日期:——
The reaction between alkyl ethaneimidothioate hydrohalides (1-alkylthioethaniminium halides) and organic halides gives unsymmetrical sulfides in good yields under liquid-liquid phase-transfer conditions.
The catalytic effectiveness of ruthenium porphyrins for ylide generation in reactions of ethyl diazoacetate and diisopropyl diazomethylphosphonate with allylic amines, sulfides and iodides is described for the first time. These reactions result mainly in products of the [2,3]-sigmatropicrearrangement of intermediate allylic ylides.
Enabling iron catalyzed Doyle–Kirmse rearrangement reactions with in situ generated diazo compounds
作者:Katharina J. Hock、Lucas Mertens、Renè Hommelsheim、Robin Spitzner、Rene M. Koenigs
DOI:10.1039/c7cc02801f
日期:——
Slow addition of sodium nitrite allows the in situ preparation of highly explosive diazo compounds and enables their safe and scalable application in ironcatalyzed rearrangement reactions of allylic and propargylic sulfides. With catalyst loadings as low as 0.1 mol% an effective entry into α-mercapto-nitriles, α-mercapto-esters and α-trifluoromethyl-sulfides on a gram-scale is achieved.
Aryne triggered [2,3]-sigmatropic rearrangement of allyl and propargyl thioethers
作者:Jiajing Tan、Tianyu Zheng、Kun Xu、Changyao Liu
DOI:10.1039/c7ob00914c
日期:——
An efficient protocol for [2,3]-sigmatropic rearrangement of allyl and propargyl thioethers is reported. The key sulfonium ylide intermediate is in situ formed via S-arylation of arynes. This transitionmetal-freemethod allows for ready access to a wide array of functionalized thioether derivatives in good to excellent yields.