PROCESS FOR THE PRODUCTION OF alpha-SUBSTITUTED BENZOINS AND BENZOIN ETHERS

摘要

Procedure for obtaining the benzoin derivatives of formula I: **(See formula)** where R1 is the same or different from R2 and R1 and R2 signify hydrogen, alkyl, alkoxy and/or halogen and R3 signifies alkyl, alkenyl, cycloalkyl, aryl or aralkyl, R4 signifies hydrogen, alkyl, alkenyl, cycloalkyl, aryl or aralkyl and X signifies oxygen or sulfur, characterized in that compounds of formula II; **(See formula)** they are reacted in the presence of bases, preferably aqueous bases, in dipolar aprotic solvents, preferably dialkyl sulfoxides, at temperatures between about 0 and 100 °, preferably around 30ºC, with electrophilic agents. (Machine-translation by Google Translate, not legally binding)