A new approach to aromatic substitution—para-specific alkylation of acetophenone by alkyl radicals in strongly acidic media
作者:Laily Bin Din、Otto Meth–Cohn、Nigel D. A. Walshe
DOI:10.1039/p19910000781
日期:——
Acetophenone in 25% oleum is substituted by various alkylradicals specifically in the para-position. The radicals used include cyclohexyl, 3-chloro-1-methylpropyl, 3-bromo-1-methylpropyl, 4-chloro-1-methylbutyl, 4-bromo-1-methylbutyl, 5-bromo-1-methylpentyl, 5-acetoxy-1-methylpentyl, 3-carboxy-1-methylpropyl, 4-carboxy-1-methylbutyl and 5-carboxy-1-methylpentyl. They were all generated by hydrogen
Friedel-Crafts alkylation of benzene and toluene with olefinic C6 hydrocarbons and esters
作者:Kenneth D. Black、Frank D. Gunstone
DOI:10.1016/0009-3084(95)02517-0
日期:1996.1
To assist our study of the reaction of toluene and other aromatic compounds with methyl oleate and other olefinic esters, benzene and toluene have been alkylated under Friedel-Crafts conditions with hex-1-ene, hex-3-ene, methyl hex-3-enoate and methyl hex-3-enedioate. The products were isolated and identified by NMR and mass spectrometric procedures.
Friedel-Crafts alkylation of benzene by normal ?-chloroalkanoic acids and their methyl esters and nitriles
作者:L. I. Zakharkin、E. V. Anikina
DOI:10.1007/bf00959375
日期:1987.2
[EN] TRANSITION METAL-CATALYZED ALKYLATION OF C-H BONDS WITH ORGANOBORON REAGENTS<br/>[FR] ALKYLATION À CATALYSEUR À BASE DE MÉTAL DE TRANSITION DE LIAISONS C-H AVEC DES RÉACTIFS D'ORGANOBORE
申请人:BRANDEIS UNIVERSITY MS134
公开号:WO2008024953A2
公开(公告)日:2008-02-28
[EN] One aspect of the present invention relates to methods for functionalization of 2-arylpyridine and arylpyrazoles with organoboron reagents in the presence of a transition metal catalyst to furnish alkylated arylpyridines and arylpyrazoles via regioselective functionalization of sp2 -hybridized C-H bonds at a position ortho to the point of attachment of the pyridine or pyrazole ring to the aromatic nucleus, hi other embodiments, the present invention provides for alkylation of sp3-hybridized C-H bonds in alkylpyridines. [FR] Selon un mode de réalisation, la présente invention concerne des procédés de fonctionnalisation de 2-arylpyridine et d'arylpyrazoles avec des réactifs d'organobore en présence d'un catalyseur à base de métal de transition pour obtenir des arylpyridines et des arylpyrazoles par fonctionnalisation régiosélective de liaisons C-H à hybridation sp2 en une position ortho au point de liaison du cycle pyridine ou pyrazole au noyau aromatique. Selon d'autres modes de réalisation, la présente invention concerne l'alkylation de liaisons C-H dans des alkylpyridines.
Enantioselective C–H Amination Catalyzed by Nickel Iminyl Complexes Supported by Anionic Bisoxazoline (BOX) Ligands
作者:Yuyang Dong、Colton J. Lund、Gerard J. Porter、Ryan M. Clarke、Shao-Liang Zheng、Thomas R. Cundari、Theodore A. Betley
DOI:10.1021/jacs.0c09839
日期:2021.1.20
Investigation of 6 via single-crystal X-ray crystallography, NMR and EPR spectroscopies, and computations revealed a Ni(II)-iminyl radical formulation, similar to its dipyrrinato congener. Complex 4 exhibits enantioselective intramolecular C-H bond amination to afford N-heterocyclic products from 4-aryl-2-methyl-2-azidopentanes. Catalytic C-H amination occurs under mild conditions (5 mol % catalyst, 60 °C)