1,2,3,5-四(三氟甲基)苯与苯基芳烃或叔丁基锂得到的脱芳构化合物,2,5-和2,4-环己二烯-1-亚烷基衍生物的混合物C 10 H 2 F 10 Ph 2,C 10 H 2 F 9 Ph 3,C 10 H 2 F 10 Bu 2 t和C 10 H 3 F 10 Bu t。获得了三苯基衍生物的X射线晶体结构。 。的1个H,19 FAND 13C NMR数据为其他化合物的结构提供了令人满意的证据。
Catalytic Decarboxylative Fluorination for the Synthesis of Tri- and Difluoromethyl Arenes
摘要:
Treatment of readily available alpha,alpha-difluoro- and alpha-fluoroarylacetic acids with Selecffluor under Ag(I) catalysis led to decarboxylative fluorination. This operationally simple reaction gave access to tri- and difluoromethylarenes applying a late-stage fluorination strategy. Translation to [F-18]labeling is demonstrated using [F-18]Selectfluor bis(triflate), a reagent affording [F-18]tri- and [F-18]difluoromethylarenes not within reach with [F-18]F-2.
family of practical, liquid trifluoromethylation and pentafluoroethylation reagents is described. We show how halogen bonding can be used to obtain easily handled liquid reagentsfrom gaseous CF3I and CF3CF2I. The synthetic utility of the new reagents is exemplified by a novel direct arene trifluoromethylation reaction as well as adaptations of other perfluoroalkylation reactions.
[EN] REAGENTS AND PROCESS FOR DIRECT C-H FUNCTIONALIZATION<br/>[FR] RÉACTIFS ET PROCÉDÉ POUR LA FONCTIONNALISATION DIRECTE DE LA LIAISON C-H
申请人:STUDIENGESELLSCHAFT KOHLE MBH
公开号:WO2020094673A1
公开(公告)日:2020-05-14
Thianthrene derivative of the Formula (I): wherein R1 to R8 may be the same or different and are selected from hydrogen, Cl, F, a partially or fully fluorinated C1 to C6 alkyl group, and wherein n is 0 or 1, with the proviso that at least one of R1 to R8 is not hydrogen and process for C-H functionalization of aromatic compounds using this compound.
Cathodic C–H Trifluoromethylation of Arenes and Heteroarenes Enabled by an in Situ-Generated Triflyltriethylammonium Complex
作者:Wolfgang Jud、Snjezana Maljuric、C. Oliver Kappe、David Cantillo
DOI:10.1021/acs.orglett.9b02948
日期:2019.10.4
While several trifluoromethylation reactions involving the electrochemical generation of CF3 radicals via anodic oxidation have been reported, the alternative cathodic, reductive radical generation has remained elusive. Herein, the first cathodic trifluoromethylation of arenes and heteroarenes is reported. The method is based on the electrochemical reduction of an unstable triflyltriethylammonium complex
[EN] FLUOROALKYLATION REAGENTS AND USES THEREOF<br/>[FR] RÉACTIFS DE FLUOROALKYLATION ET LEURS UTILISATIONS
申请人:HARVARD COLLEGE
公开号:WO2015168368A1
公开(公告)日:2015-11-05
Provided herein are halogen-bonded complexes of Formula (I), wherein is a halogen bond; R1 is unsubstituted C1-3 fluoroalkyl; D is N(R2)3, ((R2)2N)2C=NR2, 0=S(R2)2, substituted or unsubstituted heterocyclyl, or substituted or unsubstituted heteroaryl, and wherein R2 and y are as defined herein. D----(I−−R1)y (I) Further provided are methods of preparing compounds of Formula (I), compositions, reagents, and kits comprising a compound of Formula (I), and methods for fluoroalkylating an organic compound using a compound of Formula (I).
Strongly Reducing, Visible‐Light Organic Photoredox Catalysts as Sustainable Alternatives to Precious Metals
作者:Ya Du、Ryan M. Pearson、Chern‐Hooi Lim、Steven M. Sartor、Matthew D. Ryan、Haishen Yang、Niels H. Damrauer、Garret M. Miyake
DOI:10.1002/chem.201702926
日期:2017.8.16
Photoredox catalysis is a versatile approach for the construction of challenging covalent bonds under mild reaction conditions, commonly using photoredox catalysts (PCs) derived from precious metals. As such, there is need to develop organic analogues as sustainable replacements. Although several organic PCs have been introduced, there remains a lack of strongly reducing, visible-light organic PCs