Visible-Light-Mediated Tandem Difluoromethylation/Cyclization of Alkenyl Aldehydes toward CF<sub>2</sub>H-Substituted Chroman-4-one Derivatives
作者:Liu-Liang Mao、An-Xi Zhou、Xian-Hong Zhu、Huanan Peng、Li-Xia Quan、Jie-Ping Wan、Shang-Dong Yang
DOI:10.1021/acs.joc.2c01689
日期:2022.9.16
accessible and air-stable [Ph3PCF2H]+Br– as the difluoromethylation reagent, has been established. A range of CF2H-substituted chroman-4-one skeletons and their derivatives, such as 2,3-dihydroquinolin-4(1H)-ones, chroman, 3,4-dihydronaphthalen-1(2H)-one, 2,3-dihydrobenzofuran, and 2,3-dihydro-1H-inden-1-one, are efficiently produced in moderate to good yields with excellent chemoselectivity under mild reaction
已经建立了一种有效且简便的可见光介导的链烯基醛的串联二氟甲基化/环化,具有易于获得且空气稳定的 [Ph 3 PCF 2 H] + Br -作为二氟甲基化试剂。一系列 CF 2 H-取代 chroman-4-one 骨架及其衍生物,例如 2,3-dihydroquinolin-4(1 H )-ones、chroman、3,4-dihydronaphthalen-1(2 H )-one、 2,3-dihydrobenzofuran 和 2,3-dihydro-1 H -inden-1-one 在温和的反应条件下以中等至良好的收率高效生产,具有优异的化学选择性。