Silver-Catalyzed Oxidative Activation of Benzylic CH Bonds for the Synthesis of Difluoromethylated Arenes
作者:Peng Xu、Shuo Guo、Liyan Wang、Pingping Tang
DOI:10.1002/anie.201400225
日期:2014.6.2
A mild and catalytic method to form difluoromethylated arenes through the activation of benzylic CHbonds has been developed. Utilizing AgNO3 as the catalyst, various arenes with diverse functional groups undergo activation/fluorination of benzylic CHbonds with commercially available Selectfluor reagent as a source of fluorine in aqueous solution. The reaction is operationally simple and amenable
Copper-Mediated Difluoromethylation of (Hetero)aryl Iodides and β-Styryl Halides with Tributyl(difluoromethyl)stannane
作者:G. K. Surya Prakash、Somesh K. Ganesh、John-Paul Jones、Aditya Kulkarni、Kamil Masood、Joseph K. Swabeck、George A. Olah
DOI:10.1002/anie.201205850
日期:2012.11.26
Owing to their unique properties, molecules containing the difluoromethyl group (CF2H) are of great interest. Tributyl(difluoromethyl)stannane has now been used for the selective and efficient direct ipso difluoromethylation of aryl iodides, heterocyclic iodides, and β‐styryl halides (see scheme). The straightforward preparation of the difluoromethylating reagent makes this approach particularly valuable
Difluoromethylbenzanilides and use thereof for combating micro-organisms, intermediate products and use thereof
申请人:Dunkel Ralf
公开号:US20070082877A1
公开(公告)日:2007-04-12
Novel difluoromethylbenzanilides of the formula (I)
in which
R
1
, R
2
, R
3
, R
4
, R
5
and Z are as defined in the description, a plurality of processes for preparing these compounds and their use for controlling unwanted microorganisms, and also novel intermediates and their preparation.
[Ph
<sub>4</sub>
P]
<sup>+</sup>
[Cu(CF
<sub>2</sub>
H)
<sub>2</sub>
]
<sup>−</sup>
: A Powerful Difluoromethylating Reagent Inspired by Mechanistic Investigation
作者:Haiwei Zhao、Xuebing B. Leng、Wei Zhang、Qilong Shen
DOI:10.1002/anie.202210151
日期:2022.10.17
A powerful difluoromethylating reagent [Ph4P]+[Cu(CF2H)2]− that was able to difluoromethylate a variety of aryl and alkyl electrophiles was developed. In the presence of an oxidant, complex 2 also reacted with various lithium nbutyl arylboronic acid pinacol esters, alkyne and heteroarene. Moreover, complex 2 could transmetalate the difluoromethyl reagent to other metals such as [Ph4P]+[Cu(Cl2)]− and