New synthetic routes towards various α-fluorinated aryl ketones and their enantioselective reductions using baker's yeast
作者:Balaka Barkakaty、Yutaka Takaguchi、Sadao Tsuboi
DOI:10.1016/j.tet.2006.11.019
日期:2007.1
aryl ketones were obtained by oxidation of dichlorofluoromethyl aryl alcohols. Subsequent dechlorination of these ketones using sodium formaldehyde sulfoxylate (Rongalite) and reductive dehalogenating system SnCl2/Al led to various fluoromethyl aryl ketones and chlorofluoromethyl aryl ketones, respectively. Asymmetric reductions of these fluorinated ketones using the inexpensive baker's yeast produced
通过二氯氟甲基芳基醇的氧化获得高度亲电的二氯氟甲基芳基酮。随后使用甲醛合次硫酸氢钠(Rongalite)和还原性脱卤系统SnCl 2 / Al对这些酮进行脱氯,分别制得各种氟甲基芳基酮和氯氟甲基芳基酮。使用廉价的面包酵母不对称地还原这些氟化酮,可制得具有不同对映选择性的相应的氟甲基芳基醇。