Simple and Practical Routes to Enantiomerically Pure 5-(Trialkylsilyl)-2-cyclohexenones
作者:Georgios Sarakinos、E. J. Corey
DOI:10.1021/ol990805f
日期:1999.9.1
[reaction: see text] Enantiomerically pure chiral 5-silylated 2-cyclohexenones are easily prepared in high yield using as a key step kinetic resolution with a commercially available lipase. Fully active enzyme can be recovered very efficiently for reuse. The synthetic steps are outlined in Schemes 1 and 3. Enantiomerically pure 2-cyclohexenones such as 1 and 2 are versatile intermediates for the synthesis
The synthesis of 1-methoxy-3,6-bis (trimethylsilyl) cyclohexa-1,4-deine, a ketoprofen precursor has been achieved from anisole by an electrochemical way using an undivided cell fitted with a sacrificial aluminium anode and a stainless steel cathode, with or without solvent, under constant current density.