Selective C–F Functionalization of Unactivated Trifluoromethylarenes
作者:David B. Vogt、Ciaran P. Seath、Hengbin Wang、Nathan T. Jui
DOI:10.1021/jacs.9b06004
日期:2019.8.21
Fluorinated organic molecules are pervasive within the pharmaceutical and agrochemical industries due to the range of structural and physicochemical properties that fluorine imparts. To date, the most abundant methods for the synthesis of the aryl CF2-functionality have relied on the deoxyfluorination of ketones and aldehydes using expensive and poorly atom economical reagents. Here, we report a general
Solvent-free palladium-catalyzed C–O cross-coupling of aryl bromides with phenols
作者:Sergey A. Rzhevskiy、Maxim A. Topchiy、Vasilii N. Bogachev、Lidiya I. Minaeva、Ilia R. Cherkashchenko、Konstantin V. Lavrov、Grigorii K. Sterligov、Mikhail S. Nechaev、Andrey F. Asachenko
DOI:10.1016/j.mencom.2021.04.042
日期:2021.5
A new solvent-free procedure for C–O cross-coupling between phenols and aryl bromides comprising of Pd2(dba)3/ButBrettPhos catalytic system is efficient for substrates bearing donor or acceptor, as well as bulky substituents.
Redox‐Neutral Decarbonylative Cross‐Couplings Coming of Age
作者:Qun Zhao、Michal Szostak
DOI:10.1002/cssc.201900408
日期:2019.7.5
redox‐neutral decarbonylative cross‐coupling of carboxylic acids. For example, the use of acid fluorides as effective cross‐coupling partners has been found to enable control of the decarbonylation selectivity and facilitates challenging Pd0‐catalyzed nucleophilic trifluoromethylation and exogenous base‐free Suzuki cross‐coupling reactions. In another recent advance, the use of acidchlorides in room temperature
Use of Trifluoromethyl Groups for Catalytic Benzylation and Alkylation with Subsequent Hydrodefluorination
作者:Jiangtao Zhu、Manuel Pérez、Christopher B. Caputo、Douglas W. Stephan
DOI:10.1002/anie.201510494
日期:2016.1.22
The electrophilic organofluorophosphonium catalyst [(C6F5)3PF][B(C6F5)4] is shown to effect benzylation or alkylation by aryl and alkyl CF3 groups with subsequenthydrodefluorination, thus resulting in a net transformation of CF3 into CH2–aryl fragments. In the case of alkyl CF3 groups, Friedel–Crafts alkylation by the difluorocarbocation proceeded without cation rearrangement, in contrast to the corresponding
亲电子性有机氟phosph催化剂[(C 6 F 5)3 PF] [B(C 6 F 5)4 ]显示出通过芳基和烷基CF 3基团进行苄基化或烷基化,随后进行加氢脱氟,从而导致CF的净转化3成CH 2-芳基片段。在烷基CF 3基团的情况下,与烷基单氟化物的相应反应相反,通过二氟碳羰基化进行的Friedel-Crafts烷基化反应没有阳离子重排。
A counteranion triggered arylation strategy using diaryliodonium fluorides
作者:L. Chan、A. McNally、Q. Y. Toh、A. Mendoza、M. J. Gaunt
DOI:10.1039/c4sc02856b
日期:——
A mild and transition metal-free counteranion triggered arylation strategy has been developed using diaryliodonium fluorides.