A new pinane-type tridentate modifier for asymmetric reduction of ketones with lithium aluminum hydride
作者:Yie-Jia Cherng、Jim-Min Fang、Ta-Jung Lu
DOI:10.1016/0957-4166(94)00359-j
日期:1995.1
The reduction of aryl and alkenyl methyl ketones using lithium aluminum hydride modified with (1R,2S,3S,5R)-(+)-10-anilino-3-ethoxy-2-hydroxypinane (3), afforded chiral secondary alcohols in 83–96% yields and 53–97% optical yields. The modifier 3 was prepared from (1R)-(−)-myrtenol and was readily recovered (>96%) after reduction. The reduction of acetophenone in the presence of lithium iodide gave
用(1 R,2 S,3 S,5 R)-(+)-10-苯胺基-3-乙氧基-2-羟基pin烷(3)改性的氢化铝锂还原芳基和烯基甲基酮,得到手性仲醇的产率为83-96%,光学产率为53-97%。改性剂3由(1 R)-(-)-肉豆蔻醇制得,还原后易于回收(> 96%)。在碘化锂的存在下对苯乙酮的还原使该醇产物具有较高的光学收率。