Mechanism of formation of p-aminobenzyl aryl sulfides, selenides, or sulfones by the acid-catalyzed condensation of aromatic amines with formaldehyde and arenethiols, selenols, or sulfinic acids
α-Trichloromethylation of tertiary amines with trimethyl(trichloromethyl)silane by oxidative coupling, using DDQ as an oxidant, has been realized. The reaction is instantaneous, is scalable, and tolerates a broad range of functional groups and heteroarenes. The trichloromethylated products can be easily converted into β,β-dichloroamines, enamines, and α-amino acid esters under operationally simple conditions
benzylation of amines with benzylic alcohols to give benzylamines has been newly developed by using palladium/phosphine-borane catalyst system. In this catalytic reaction, the linking between both phosphine and borane moieties in the ligand is very important. Hydroxy group of benzylic alcohols is activated by Lewis acidic borane to form a benzylpalladium intermediate which is attacked by amines to give benzylamine
Iron-catalysed oxidation of N,N-dimethylaniline with molecular oxygen
作者:Satoru Murata、Masahiro Miura、Masakatsu Nomura
DOI:10.1039/c39890000116
日期:——
N,N-Dimethylaniline is oxidised by molecularoxygen in the presence of a number of iron complexes or salts in acetonitrile to give a mixture of N-methylformanilide and 4,4′-methylenebis(N,N′-dimethylaniline) together with N-methylaniline, the product composition being a marked function of the identity of the iron species employed.
A series of lanthanoid (Ln3+) based Lewis acid catalysts were investigated as alternatives to other metal based catalysts for the formation of Michlers hydride, 4,4-methylenebis(N,N-dimethylaniline) (1). The lanthanoid based Lewis acid catalysts were superior to previously published catalysts resulting in formation of 4,4-methylenebis(N,Ndimethylaniline) (1) and N,N-dimethyl-4-(4-(methylamino)benzyl)aniline (2). If paraformaldehyde was added to the reaction only 4,4-methylenebis(N,N-dimethylaniline) (1) was formed.