[EN] METHOD FOR PREPARING SILAHYDROCARBONS<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION DE SILAHYDROCARBURES
申请人:UNIV DELAWARE
公开号:WO2018064163A1
公开(公告)日:2018-04-05
The present disclosure is directed to a process for preparing silahydrocarbons of formula (I), the process comprising the step of reacting a compound of formula (II), with a compound of formula (III), as well as to silahydrocarbons prepared by such a process, and to compositions and articles of manufacture comprising such silahydrocarbons.
Under acidic conditions zinc reduces diselenides to afford selenols, which can be either isolated or treated in situ with alkyl halides to produce alkyl selenides or with epoxides to give β-hydroxyselenides.
wide variety of alkyl halides with mercury(I) and/or (II) nitrate in 1,2-dimethoxyethane, mercury(II) acetate in acetic acid, aqueous mercury(II) perchlorate, and mercury(II) perchlorate in alcohol solvents have been investigated; as a result, simple high yield procedures for the conversion of alkyl halides into the corresponding nitrate esters, acetate esters, alcohols and ethers have been developed.
A solution of hydrogen bromide (HBr) in 1,4-dioxane was prepared and investigated for its ability to brominate alcohols, and hydrobrominate alkenes. This study revealed that the brominating ability of this HBr/1,4-dioxane solution is equal or superior to that of hydrobromic acid or HBr in acetic acid. The solution of HBr in 1,4-dioxane is robust, exhibiting no decomposition of the solvent, and retaining
Silica gel-mediated hydrohalogenation of unactivated alkenes using hydrohalogenic acids under organic solvent-free conditions
作者:Kiyoshi Tanemura
DOI:10.1016/j.tetlet.2018.10.043
日期:2018.12
Silica gel-mediated hydrochlorination of unactivated alkenes using 35% hydrochloric acid underorganicsolvent-freeconditions proceeded to give the corresponding chlorides in good yields. Hydrobromination or hydriodination using 47% hydrobromic acid or 55% hydriodic acid afforded the corresponding halides, respectively. Silica gel could be recycled five times without any significant loss of activities