Difluorination of Functionalized Aromatic Olefins Using Hypervalent Iodine/HF Reagents
作者:Tsugio Kitamura、Kento Yoshida、Shota Mizuno、Azusa Miyake、Juzo Oyamada
DOI:10.1021/acs.joc.8b02473
日期:2018.12.21
The hypervalent iodine/HF reagent consisting of PhIO and HF·py was found to be effective for fluorination of functionalized aromatic olefins bearing synthetically important carbonyl and hydroxyl groups. Fluorination of 1,3-diphenyl-2-propen-1-one with PhIO/HF·py reagent in CH2Cl2 at room temperature gave 3,3-difluoro-1,2-diphenyl-1-propanone in high yield. Other α-aryl-α,β-unsaturated ketones underwent
发现由PhIO和HF·py组成的高价碘/ HF试剂可有效氟化带有合成重要羰基和羟基的官能化芳族烯烃。室温下,用PhIO / HF·py试剂在CH 2 Cl 2中对1,3-二苯基-2-丙-1-酮进行氟化,从而高收率得到3,3-二氟-1,2-二苯基-1-丙酮。其他α-芳基-α,β-不饱和酮经过氟化反应以高到高收率得到芳基2,2-二氟乙基酮衍生物。使用p催化氟化α-芳基-α,β-不饱和酮-TolI / HF·py / mCPBA试剂系统也运行良好。此外,用PhIO / HF·py试剂对肉桂醇衍生物进行氟化反应进行得很顺利,从而以中等收率得到了2-芳基-3,3-二氟-1-丙醇。