[EN] CATALYST-FREE AND REDOX-NEUTRAL INNATE TRIFLUOROMETHYLATION AND ALKYLATION OF (HETERO)AROMATICS ENABLED BY LIGHT [FR] TRIFLUOROMÉTHYLATION INNÉE EXEMPTE DE CATALYSEUR ET NEUTRE À L'OXYDORÉDUCTION, ET ALKYLATION DE COMPOSÉS (HÉTÉRO)AROMATIQUES ACTIVÉS PAR LA LUMIÈRE
Improved synthesis of trifluoromethyl sulfones used as intermediates for the preparation of di- or tri-substituted olefins
作者:Fabrice Eugene、Bernard Langlois、Eliane Laurent
DOI:10.1016/0022-1139(93)02909-x
日期:1994.3
Primary and secondary trifluoromethyl sulfones (triflones) are efficiently obtained from easily available sodium trifluoromethanesulfinate (triflinate) and alkyl bromides in N,N-dimethylacetamide. This technique is more powerful than the potassium triflinate/acetonitrile system. Ethyl aconitate can be also produced in one step from ethyl bromoacetate and diisopropylethylamine, sodium triflinate being
Triarylamines as catalytic donors in light-mediated electron donor–acceptor complexes
作者:Durbis J. Castillo-Pazos、Juan D. Lasso、Ehsan Hamzehpoor、Jorge Ramos-Sánchez、Jan Michael Salgado、Gonzalo Cosa、Dmytro F. Perepichka、Chao-Jun Li
DOI:10.1039/d2sc07078b
日期:——
Recently, photochemistry of ElectronDonor–Acceptor (EDA) complexes employing catalytic amounts of electron donors have become of interest as a new methodology in the catalysis field, allowing for decoupling of the electron transfer (ET) from the bond-forming event. However, examples of practical EDA systems in the catalytic regime remain scarce, and their mechanism is not yet well-understood. Herein
CATALYST-FREE AND REDOX-NEUTRAL INNATE TRIFLUOROMETHYLATION AND ALKYLATION OF (HETERO)AROMATICS ENABLED BY LIGHT
申请人:THE ROYAL INSTITUTION FOR THE ADVANCEMENT OF LEARNING/MCGILL UNIVERSITY
公开号:US20200216430A1
公开(公告)日:2020-07-09
The present disclosure relates to reagents and method for performing trifluoromethylation, difluoromethylation or alkylation of aromatic or heteroaromatic rings in a redox-neutral manner without any catalyst which are enabled by light. In addition, there are methods for synthesizing the starting reagents used in the trifluoromethylation, difluoromethylation or alkylation reactions.
[EN] CATALYST-FREE AND REDOX-NEUTRAL INNATE TRIFLUOROMETHYLATION AND ALKYLATION OF (HETERO)AROMATICS ENABLED BY LIGHT<br/>[FR] TRIFLUOROMÉTHYLATION INNÉE EXEMPTE DE CATALYSEUR ET NEUTRE À L'OXYDORÉDUCTION, ET ALKYLATION DE COMPOSÉS (HÉTÉRO)AROMATIQUES ACTIVÉS PAR LA LUMIÈRE
申请人:THE ROYAL INSTITUTION FOR THE ADVANCEMENT OF LEARNING/MCGILL UNIV
公开号:WO2019060998A1
公开(公告)日:2019-04-04
The present disclosure relates to reagents and method for performing trifluoromethylation, difluoromethylation or alkylation of aromatic or heteroaromatic rings in a redox-neutral manner without any catalyst which are enabled by light. In addition, there are methods for synthesizing the starting reagents used in the trifluoromethylation, difluoromethylation or alkylation reactions.
Catalyst-Free and Redox-Neutral Innate Trifluoromethylation and Alkylation of Aromatics Enabled by Light
作者:Peng Liu、Wenbo Liu、Chao-Jun Li
DOI:10.1021/jacs.7b08685
日期:2017.10.11
functionalize aromaticsvia alkyl radical addition. Current approaches to prepare alkyl radicals follow either oxidative or reductive pathways from various functional groups. Developing new strategy beyond these traditional methods remains elusive yet highly significant. In this article, we present a redox-neutral and catalyst-free protocol to engender alkyl radicals in the context of trifluoromethylation and
Minisci 烷基化可用于通过烷基自由基加成对芳烃进行官能化。当前制备烷基自由基的方法遵循来自各种官能团的氧化或还原途径。开发超越这些传统方法的新战略仍然难以捉摸,但意义重大。在本文中,我们提出了一种氧化还原中性和无催化剂的方案,以在芳烃的三氟甲基化和一般烷基化的背景下产生烷基自由基。该协议通过 Norrish I 型概念产生烷基自由基,适应各种官能团并以良好的产率提供产品。该方法在光的辅助下鉴定了一系列化合物作为三氟甲基化和烷基化试剂。预计这些化合物可以在其他涉及自由基的反应中找到潜在的应用。