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
Copper-Catalyzed CH Oxidation/Cross-Coupling of α-Amino Carbonyl Compounds
作者:Ji-Cheng Wu、Ren-Jie Song、Zhi-Qiang Wang、Xiao-Cheng Huang、Ye-Xiang Xie、Jin-Heng Li
DOI:10.1002/anie.201109027
日期:2012.4.2
indoles selectively furnishes 1 and 2 with the aid of tert‐butyl hydroperoxide (TBHP). The method represents the first example of a copper‐catalyzedα arylation of α‐amino carbonyl substrates leading to α‐aryl α‐imino and α‐aryl α‐oxo carbonyl compounds using a CH oxidation strategy.
ABSTRACT A novel iron-catalyzed oxidative coupling of indoles with α-amino carbonyl compounds has been developed. The transformation provides an attractive approach to the synthesis of 3-acylindoles, with the advantages of easily available starting materials and high functional group tolerance. Furthermore, control experiments imply that a radical process maybe involved in this reaction. GRAPHICAL
An atom-efficient, catalyst-free and environmentally friendly approach towards the synthesis of 1,3,4-trisubstituted imidazolidines (4a–4p) through a multicomponent reaction involving monophenacyl anilines 1, aromatic amines 2 and formaldehyde 3 has been developed. The reaction proceeds in refluxing ethanol providing higher yields of the imidazolidines.
for the simple copper‐catalyzedα‐amination of α‐aminocarbonyl compounds to afford 2‐amino‐2‐iminocarbonyl and 2‐amino‐2‐oxocarbonyl compounds is reported. This transformation is achieved by C(sp3)−H and N−H bond oxidative cross‐coupling and selective C−N bond oxidative cleavage. This reaction system has a broad reaction scope, providing a facile pathway for the α‐functionalization of α‐amino ketones
A Mild, Selective Copper-Catalyzed Oxidative Phosphonation of α-Amino Ketones
作者:Bin Yang、Ting-Ting Yang、Xi-An Li、Jun-Jiao Wang、Shang-Dong Yang
DOI:10.1021/ol402355a
日期:2013.10.4
A novel and selective method of simple copper-salt catalyzed phosphonation of alpha-amino carbonyl compounds to afford imidoylphosphonates is reported. This reaction system has a broad reaction scope. The convenient and environmentally benign process makes this protocol very attractive.