Die N-(4'-Nitrophenacyl)-arylamine 5, hergestellt aus den Arylaminen 3 和 4-Nitrophenacylbromid (2), haben in Abhängigkeit von den Arylsubstituenten eine gelbe, rote oder violette Farbe。Sie wird zurückgeführt auf intramolekulare Wechselwirkung zwischen dem Nitrobenzoylsystem als Elektronenacceptor und dem Arylaminteil als Elektronendonator。Be Acetylierung des Aminstickstoffs geht die Farbe verloren。Für
A general and mild method for the construction of a carbon–nitrogen bond via copper-catalyzedoxidativecross-coupling of amines with α-aminocarbonyl compounds was achieved. Amines, either aliphatic primary amines, aromatic primary amines or secondary amines can be used as the starting materials. When R2 was different from R3, two isomers would be observed. Therefore, this reaction system has a broad
Synthesis of ( Z )-nitroalkene derivatives through oxidative dehydrogenation coupling of α -aminocarbonyl compounds with nitromethane by copper catalysis
作者:Menghua Zhu、De Chen、Sheng Zeng、Chenhu Xing、Wei Deng、Jiannan Xiang、Rui-Jia Wang
DOI:10.1016/j.tetlet.2018.07.032
日期:2018.8
A novel copper-catalyzed cross-dehydrogenative coupling reaction of α-amino carbonyl compounds with nitromethane to synthesis of (Z)-nitroalkene derivatives has been established. (Z)-Nitroalkene derivatives are achieved through the cleavage of sp3 CsbndH bonds and formation of CsbndC double bond, with mild reaction conditions and excellent stereoselectivity.
The invention disclosed in this document is related to the field of pesticides and their use in controlling pests. A compound having the following structure is disclosed.
Nickel-Catalyzed Oxidative Cyclotrimerization of α-Amino Ketones: Selective Synthesis of Pyrazoles
作者:Jian-Nan Xiang、Jin-Heng Li、Ri-Yuan Tang、Xiao-Kang Guo、Ming Hu、Zhi-Qiang Wang
DOI:10.1055/s-0033-1340014
日期:——
A new strategy for the synthesis of 3-methylene-2,3-dihydro-1 H -pyrazoles is presented by Ni-catalyzed oxidative cyclotrimerization of α-aminoketones. This unprecedented method allows three α-aminoketones to undergo sequential multiple deprotonations and deamination through two C–C bonds and one N–N bond formation cascade.