Palladium-Catalyzed Decarboxylative Acylation of <i>N</i>-Nitrosoanilines with α-Oxocarboxylic Acids
作者:Yinuo Wu、Lei Sun、Yunyun Chen、Qian Zhou、Jia-Wu Huang、Hui Miao、Hai-Bin Luo
DOI:10.1021/acs.joc.5b02535
日期:2016.2.5
A palladium-catalyzed oxidative C–H bond decarboxylative acylation of N-nitrosoanilines using α-oxocarboxylic acid as the acyl source is described. The catalyst Pd(OAc)2 and oxidant (NH4)2S2O8 enabled ortho-acylation of N-nitrosoanilines at room temperature, affording an array of N-nitroso-2-aminobenzophenones in moderate to excellent yields.
描述了使用α-氧代羧酸作为酰基源的钯催化的N-亚硝基苯胺的氧化C–H键脱羧酰化反应。催化剂Pd(OAc)2和氧化剂(NH 4)2 S 2 O 8可以在室温下对N-亚硝基苯胺进行邻酰化,从而以中等至极好的收率提供了一系列N-亚硝基-2-氨基二苯甲酮。
N-Dealkylation-N-nitrosation of tertiary aromatic amines by N-butyl nitrite
作者:Giancarlo Verardo、Angelo G. Giumanini、Paolo Strazzolini
DOI:10.1016/s0040-4020(01)81940-2
日期:1991.9
nitrosation was never observed, but minor amounts of m- and p-nitro amines and/or nitrosamines were formed in some cases. Ring nitration is rather a reaction of the initial substrate than a process occurring on formed nitrosamines. The leaving propensities of the initial N-substituents to yield nitrosamines were in the order benzylmethyl alkyl.
cobalt(III)-catalyzed cross-coupling/cyclization of aryl C–H bonds of N-nitrosoanilines with α-diazo-β-ketoesters has been achieved. This protocol features a unique combination of Csp2-H activation/Wolffrearrangement process, allowing for the rapid assembly of quaternary 2-oxindoles. The empirical evidence and density functional theory (DFT) calculations reveal the trapping process of transient acceptor ketene
Rh(III)‐Catalyzed N‐Nitroso Directed C‐H Arylation for Facile Construction of Diverse N‐Hetero Biaryl Compounds
作者:Pei‐Long Wang、Yan Wang、Yan Li、Xi‐Sheng Wang
DOI:10.1002/asia.202000949
日期:2020.11.16
A Rh(III)‐catalyzed C−H arylation reaction of N‐nitrosoanilines has been developed in which arylboronic acids were used as arylation reagents. It provides an efficient strategy for the synthesis of N‐nitroso‐[1,1′‐biphenyl]‐2‐amine, which is an important starting material for the synthesis of N‐hetero biaryl compounds, such as 2‐amine‐1,1′‐biphenyl, carbazole, phenanthridone. This protocol can be applied
Palladium-catalyzed oxidative C–H bond acylation of N-nitrosoanilines with toluene derivatives: a traceless approach to synthesize N-alkyl-2-aminobenzophenones
作者:Yinuo Wu、Ling-Jun Feng、Xiao Lu、Fuk Yee Kwong、Hai-Bin Luo
DOI:10.1039/c4cc07440h
日期:——
A palladium-catalyzed cascade cross-coupling of N-nitroso-anilines and toluene derivatives for the direct synthesis of N-alkyl-2-aminobenzophenones is described. N-nitroso groups in anilines can act as the traceless directing groups while toluene derivatives can serve as effective acyl precursors under mild reaction conditions.