Palladium-Catalyzed Arylation of Fluoroalkylamines
作者:Andrew T. Brusoe、John F. Hartwig
DOI:10.1021/jacs.5b02512
日期:2015.7.8
fluoroalkylaniline products are unstable under typical conditions for C-N coupling reactions (heat and strong base). However, the reactions conducted with the weaker base KOPh, which has rarely been used in cross-coupling to form C-N bonds, occurred in high yield in the presence of a catalyst derived from commercially available AdBippyPhos and [Pd(allyl)Cl]2. Under these conditions, the reactions occur with low
[EN] PALLADIUM-CATALYZED ARYLATION OF FLUOROALKYLAMINES<br/>[FR] ARYLATION CATALYSÉE PAR LE PALLADIUM DE FLUOROALKYLAMINES
申请人:UNIV CALIFORNIA
公开号:WO2016183101A1
公开(公告)日:2016-11-17
Methods for synthesizing trifluoroethyl, difluoroethyl, pentafluoropropyl, and difluorophenethyl anilines by palladium-catalyzed coupling of fluoroalkylamines with aryl bromides and aryl chlorides are provided herein. The reaction is conducted with a weaker base such as KOPh in the presence of a catalyst derived from AdBippyPhos and [Pd(allyl)Cl]2. The reactions occur with catalyst loadings less than about 0.50 mol% and tolerate the presence of various functional groups that react with the strong bases that are typically used in Pd-catalyzed C-N cross coupling reactions of aryl halides. The resting state of the catalyst is the phenoxide complex, (BippyPhosPd(Ar)OPh); due to the electron-withdrawing property of the fluoroalkyl substituent, the turn-over limiting step of the reaction is reductive elimination to form the C-N bond.
Traceless N‐Polyfluoroalkylation of Weakly Nucleophilic Nitrogen Containing Compounds
作者:Laura Santos、Florian Audet、Morgan Donnard、Armen Panossian、Jean-Pierre Vors、David Bernier、Sergii Pazenok、Frederic R. Leroux
DOI:10.1002/chem.202300792
日期:——
the high cost, toxicity or environmental impact of commonly used polyfluoroalkylation reagents. We report the sulfuryl fluoride (SO2F2)-mediated N-polyfluoroalkylation of weakly nucleophilic nitrogencompounds from readily available fluorinated alcohols. This method opens access to a variety of N-polyfluoroalkylated building blocks that are highly valuable for life science applications.
由于常用多氟烷基化试剂的高成本、毒性或环境影响, N-多氟烷基化反应具有挑战性。我们报告了硫酰氟 (SO 2 F 2 ) 介导的弱亲核氮化合物的N -多氟烷基化,这些化合物来自现成的氟化醇。该方法开启了对各种N-多氟烷基化构建块的访问,这些构建块对生命科学应用具有很高的价值。
4-Amino-2-ureido-pyrimidin-5-carbonsäureamide, Verfahren zu deren Herstellung, diese Verbindungen enthaltende Arzneimittel und deren Verwendung
申请人:HOECHST AKTIENGESELLSCHAFT
公开号:EP0816359A1
公开(公告)日:1998-01-07
Es werden tertiäre 4-Amino-2-ureido-pyrimidin-5- carbonsäure-amide der Formel I,
worin R1 bis R4 die angegebenen Bedeutungen haben, sowie deren physiologisch verträglichen Salze und ein Verfahren zu deren Herstellung beschrieben. Die Verbindungen eignen sich zur Behandlung von Lipidstoffwechselstörungen.
描述了式 I 的叔 4-氨基-2-脲基嘧啶-5-羧酸酰胺、
式中 R1 至 R4 的含义,以及它们的生理耐受盐和制备工艺。这些化合物适用于治疗脂质代谢紊乱。