One‐Pot Construction of Fluorinated Chiral Alcohols via Sequential Substitution/Asymmetric Transfer Hydrogenation of
<i>α</i>
‐Bromoarylketones and Fluoroalcohols
作者:Rongrong Zhao、Qiao Wei、Yuxin Huang、Qin Qu、Qixing Liu、Haifeng Zhou
DOI:10.1002/adsc.202201219
日期:——
A one-pot synthesis of fluorinated chiral alcohols from α-bromoarylketones and fluoroalcohols is described. The fluorinated ketone intermediates were formed from α-bromoarylketones with fluoroalcohols as nucleophiles and solvents, which were reduced subsequentially by adding a chiral Ru catalyst and a mixture of formic acid and triethyl amines (FA: TEA=1.1:1) as hydrogen donor to give 27 examples of
描述了由α-溴芳基酮和氟代醇一锅法合成氟化手性醇。氟化酮中间体由α-溴芳基酮与氟代醇作为亲核试剂和溶剂形成,随后通过添加手性Ru催化剂以及甲酸和三乙胺的混合物(FA:TEA=1.1:1)作为氢供体进行还原,得到氟化酮中间体27 个氟化手性醇的例子,产率为 60-93%,ee 值为 85-98%。值得注意的是,K 3 PO 4作为亲核取代的基础和还原步骤的添加剂,以增强反应活性和对映选择性,这对于构建一锅法的兼容条件至关重要。这种一锅法也适用于克级合成。