Robust Acenaphthoimidazolylidene Palladacycles: Highly Efficient Catalysts for the Amination of N-Heteroaryl Chlorides
作者:Qinyue Deng、Yang Zhang、Haibo Zhu、Tao Tu
DOI:10.1002/asia.201700877
日期:2017.9.19
A series of robust N‐heterocyclic carbene palladacycles have been successfully developed. These showed high catalytic activity and selectivity toward the challenging amination of N‐heteroaryl chlorides. Different primary and secondary amines were fully compatible with this catalytic system. Remarkably, no double amination products could be detected when primary amines were utilized in our catalytic
PhPAd‐DalPhos: Ligand‐Enabled, Nickel‐Catalyzed Cross‐Coupling of (Hetero)aryl Electrophiles with Bulky Primary Alkylamines
作者:Joseph P. Tassone、Emma V. England、Preston M. MacQueen、Michael J. Ferguson、Mark Stradiotto
DOI:10.1002/anie.201812862
日期:2019.2.18
The base metal‐catalyzed C−N cross‐coupling of bulky α,α,α‐trisubstituted primary alkylamines with (hetero)aryl electrophiles represents a challenging and under‐developed class of transformations that is of significant potential utility, including in the synthesis of lipophilic active pharmaceutical ingredients. Herein, we report that a new, air‐stable Ni(II) pre‐catalyst incorporating the optimized
Buttressing Effect as a Key Design Principle towards Highly Efficient Palladium/N-Heterocyclic Carbene Buchwald-Hartwig Amination Catalysts
作者:Yin Zhang、Guy Lavigne、Noël Lugan、Vincent César
DOI:10.1002/chem.201702859
日期:2017.10.4
The backbone substitution of the standard 1,3‐bis(2,6‐diisopropylphenyl)‐2H‐imidazol‐2‐ylidene (IPr) ligand by dimethylamino groups was previously shown to induce a dramatic improvement in the catalytic efficiency of the corresponding Pd–PEPPSI (pyridine‐enhanced pre‐catalyst preparation, stabilization, and initiation) pre‐catalysts in N‐arylation reactions. Herein, a thorough structure/activity study
A series of (1-adamantyl)aminopyrimidine and -pyridine derivatives was prepared by adamantyl cation attack on amino heterocycles. The adamantylated compounds. particularly 2-(1-adamantyl)amino-6-methylpyridine, were found to be potent TNF-alpha inducers in murine melanoma cells transduced with gene for human TNF-alpha. (C) 2001 Elsevier Science Ltd. All rights reserved.
Arylation of adamantanamines: VI. Palladium-catalyzed arylation of amines and diamines of the adamantane series with 3-bromopyridine
作者:A. D. Averin、T. Yu. Baranova、A. S. Abel、V. V. Kovalev、A. K. Buryak、G. M. Butov、E. N. Savelyev、B. S. Orlinson、I. A. Novakov、I. P. Beletskaya
DOI:10.1134/s1070428013010016
日期:2013.1
Palladium-catalyzed amination of 3-bromopyridine with amines of the adamantane series in the presence of Pd(dba)(2)/L [L = 2,2'-bis(diphenylphosphino)-1,1'-binaphthyl or 2-dimethylamino-2'-dicyclohexylphosphinobiphenyl] gave the desired N-(pyridin-3-yl)-substituted amines in 74-97% yields. Diamines of the adamantane series reacted with 2 equiv of 3-bromopyridine in a complicated fashion to produce mono- and triaryl-substituted derivatives as by-products, while the yields of N,N'-diarylation products were 18-56%. DOI: 10.1134/S1070428013010016