Catalytic Enantioselective Borohydride Reduction of <i>Ortho</i>-Fluorinated Benzophenones
作者:Ai Kokura、Saiko Tanaka、Taketo Ikeno、Tohru Yamada
DOI:10.1021/ol060927p
日期:2006.7.1
[reaction: see text] In the presence of the optically active ketoiminatocobalt(II) complexes, the enantioselective borohydride reduction of benzophenones was successfully completed. The fluorine atom on the ortho position of the benzophenone and aryl ketones proved effective for obtaining high enantioselectivities. The combined use of modified lithium borohydride afforded the corresponding benzhydrols
[反应:见正文]在光学活性酮亚胺钴(II)配合物的存在下,对苯甲酮的对映选择性硼氢化物还原成功完成。二苯甲酮和芳基酮邻位的氟原子被证明对获得高对映选择性是有效的。改性硼氢化锂的组合使用以高收率和高对映选择性(88-96%ee)提供了相应的苯甲醇和芳基甲醇。