Visible Light Induced Oxydifluoromethylation of Styrenes with Difluoromethyltriphenylphosphonium Bromide
作者:Yang Ran、Qing-Yu Lin、Xiu-Hua Xu、Feng-Ling Qing
DOI:10.1021/acs.joc.6b00234
日期:2016.8.19
A convenient, visiblelightinduced oxidifluoromethylation of styrenes was developed. This protocol employs the readily prepared difluoromethyltriphenylphosphonium bromide as the difluoromethylating reagent and alcohols/water as the nucleophiles, affording difluoromethyl(CF2H)-containing alcohols and ethers in moderate to excellent yields.
Visible-Light-Induced Hydrodifluoromethylation of Alkenes with a Bromodifluoromethylphosphonium Bromide
作者:Qing-Yu Lin、Xiu-Hua Xu、Ke Zhang、Feng-Ling Qing
DOI:10.1002/anie.201509282
日期:2016.1.22
Bromodifluoromethylphosphonium bromide was solely used as the precursor of difluorocarbene. Herein, an unprecedented visible‐light‐induced hydrodifluoromethylation of alkenes with bromodifluoromethylphosphonium bromide using H2O and THF as hydrogen sources for the synthesis of difluoromethylated alkanes is described. This difluoromethylation is characterized by mild reaction conditions, ready availability
HCF<sub>2</sub>Se/HCF<sub>2</sub>S Installation by Tandem Substitutions from Alkyl Bromides
作者:Min Zhang、Jin-Hong Lin、Ji-Chang Xiao
DOI:10.1021/acs.joc.1c01718
日期:2021.9.17
Herein we describe an efficient construction of HCF2Se and HCF2S groups by tandem substitutions between alkylbromides and a reagent system consisting of MSeCN (or MSCN) and Ph3P+CF2H Br–. The tandem process occurs via the first nucleophilic substitution of alkylbromides by −SeCN (or −SCN) and the subsequent nucleophilic difluoromethylation.
在本文中,我们描述了通过烷基溴和由 MSeCN(或 MSCN)和 Ph 3 P + CF 2 H Br –组成的试剂系统之间的串联取代有效构建 HCF 2 Se 和 HCF 2 S 基团。串联过程通过烷基溴被-SeCN(或-SCN)的第一次亲核取代和随后的亲核二氟甲基化发生。
Visible-Light-Promoted Synthesis of α-CF<sub>2</sub>H-Substituted Ketones by Radical Difluoromethylation of Enol Acetates
An efficient and novel visible-light-promoted radical difluoromethylation of enol acetates for the synthesis of α-CF2H-substituted ketones has been described. Upon irradiation under blue LED with catalytic amounts of fac-Ir(ppy)3, this photocatalytic procedure employs difluoromethyltriphenylphosphonium bromide as a radical precursor. Various α-CF2H-substituted ketones are successfully created via designed