Indium(I) Iodide-Promoted Cleavage of Diaryl Diselenides and Disulfides and Subsequent Condensation with Alkyl or Acyl Halides. One-Pot Efficient Synthesis of Diorganyl Selenides, Sulfides, Selenoesters, and Thioesters
作者:Brindaban C. Ranu、Tanmay Mandal
DOI:10.1021/jo0493727
日期:2004.8.1
disulfides undergo facile cleavages by indium(I) iodide and the corresponding generated selenate and thiolate anions condense in situ with alkyl or acyl halides present in the reaction mixture. Thus, a simple, efficient, and general procedure has been developed for the synthesis of unsymmetrical diorganyl selenides, sulfides (thioethers), selenoesters, and thioesters by this one-pot reaction at room temperature
Monothioacetals are obtained by treating the corresponding acetals with organotin thiophenoxides in the presence of BF2·OEt2. The reaction proceeds under mild conditions to provide the desired compounds with high selectivity.
Clay Catalysis: A Simple and Efficient Synthesis of Enolthioethers from Cyclic Ketones
作者:Bouchta Labiad、Didier Villemin
DOI:10.1055/s-1989-27180
日期:——
Montmorillonite KSF in refluxing toluene catalyses the synthesis of 1-alkyl- and 1-arylthioalkenes from ketones and thiols (thiophenol or 1-butanethiol).
R3SiMgMe and MnCl2 are disclosed. (1) The manganese species reacted with terminal acetylenes to give 1,2-disilylated 1-alkenes. Mono- and bis(trimethylsilyl) acetylenes gave tri- and tetrasilylated ethenes, respectively, in good yields. Highly strained tetrakis(trimethylsilyl) ethene has now become easily accessible by this technique. (2) The reaction of alkenyl halides, alkenyl sulfides, and enol phosphates
The reaction of alkenyl halides, alkenyl sulfides, and enol phosphates with (R3Si)3MnMgMe provides vinylsilanes in good yields. The method is also applicable to the allylsilanesynthesis from allylic sulfides and ethers.