1-Lithio-2,2-diphenoxy-1-(phenylsulfonyl)cyclopropane as β-lithio acrylate and cyclopropanone acetal anion synthons.
作者:Manat Pohmakotr、Jantima Ratchataphusit
DOI:10.1016/s0040-4020(01)80161-7
日期:1993.1
1-Lithio-2,2-diphenoxy-1-(phenylsulfonyl)cyclopropane (4) reacted with alkyl halides to give the alkylated cyclopropyl sulfones 6, which were subjected to hydrolysis with TiCl4 in CH2Cl2 followed by elimination of the phenylsulfonylgroup with DBU to afford α,β-unsaturated esters 8 and small amount of β,γ-unsaturated esters 9. Furthermore, reductive removal of the phenylsulfonylgroup of compound 6 by using
Method of preparing acyloxybenzenesulfonic acids and salts thereof
申请人:ETHYL CORPORATION
公开号:EP0165480A1
公开(公告)日:1985-12-27
Alkali metal salts and alkaline earth metal salts of' acyloxybenzenesulfonate are prepared by sulfonating an aryl ester of an organic acid with gaseous sulfur trioxide to produce a sulfonation reaction mixture containing acyloxybenzenesulfonic acid, neutralizing the sulfonation reaction mixture with alkali metal hydroxide or alkaline earth metal hydroxide to produce an alkali metal salt or alkaline earth metal salt of an acyloxybenzenesulfonic acid and thereafter recovering from the reaction mixture the acyloxybenzenesulfonic acid salt product thus formed.