The reactions of a variety of 1,3-bis(phenylthio)propanes with butyllithium have been shown to produce cyclopropyl phenyl sulfides in good to high yields. A new and convenient in situ preparation of 1-lithiocyclopropyl phenyl sulfide can be readily carried out by treating 1,3-bis(phenylthio)propane with 2 equiv. of butyllithium at 0 °C in THF. The reaction with electrophiles proceeds in good yield
Silicananoparticles as a reusable catalyst: a straightforward route for the synthesis of thioethers, thioesters, vinyl thioethers and thio-Michael adducts under neutral reaction conditions
作者:Subhash Banerjee、Jayanta Das、Richard P. Alvarez、Swadeshmukul Santra
DOI:10.1039/b9nj00399a
日期:——
A simple and straightforward route for the synthesis of thioethers, thioesters, vinyl thioethers and thio-Michael adducts has been demonstrated using silica nanoparticles (NPs) as a reusable catalyst via the 1,2-addition of thiols to alkenes, alkynes and alkyl/acyl halides, and the 1,4-addition of thiols to conjugated alkenes at room temperature.
The Phenylthiocyclopropylsilyl Group: a Useful Latent Hydroxy Group
作者:Rémy Angelaud、Yannick Landais
DOI:10.1016/s0040-4020(00)00112-5
日期:2000.3
The α-dimethyl(1-phenylthio)cyclopropylsilylgroup was used as a new masked hydroxy group. Three procedures have been devised to allow the oxidation of this silicon group in the presence of various functionalities. The desired alcohols are obtained in high yields with retention of configuration at the carbon centre.
1,3-Bis(phenylthio)propane reacted readily with 2–2.2 equiv. of n-butyllithium in THF at 0°C to afford 1-lithiocyclopropylphenylsulfide. Treatment of the substituted 1,3-bis(phenylthio)propanes w...
Aryl 1-chloroalkyl sulfoxides as acyl anion equivalents: a new synthesis of vinyl sulfides, ketones, and diketones from aryl 1-chloroalkyl sulfoxides and α,ω-dichloro-α,ω-disulfinylalkanes
anhydride and NaI in acetone at low temperature afforded vinyl sulfides in high yields. The vinyl sulfides were converted to ketones by hydrolysis with HClO4 in refluxing 1,4-dioxane in good yields. In this procedure, the lithiated aryl 1-chloroalkyl sulfoxides acted as acylanionequivalents. The procedure was extended to a synthesis of α,ω-diketones starting from α,ω-dichloro-α,ω-disulfinylalkanes. The procedure