[EN] PROCESS FOR PREPARING BICYCLO[2.2.2]OCTANE-1,4-DIOL<br/>[FR] PROCÉDÉ DE PRÉPARATION DE BICYCLO[2.2.2]OCTANE-1,4-DIOL
申请人:EASTMAN CHEM CO
公开号:WO2021091544A1
公开(公告)日:2021-05-14
Provided is a process for preparing bicyclo[2.2.2]octane-1,4-diol starting from cyclohexane-1,4-dione. The diene is reacted with certain trialkylsilyl halides or trimethylsilyl trifluormethanesulfonate in the presence of a non-nucleophilic base to afford a silyl-substituted diene, which is in turn reacted with ethylene and subsequently reduced to provide the title compound.
Treatment of aliphatic carbonylcompounds with trimethylsilyl chloride with Mg turning for Grignard reaction without any pre-treatment in N,N-dimethylformamide at room temperature brought about highly facile, effective and stereoselective coupling to give the corresponding silylenolethers in good yields.