α-Cyanation of Aromatic Tertiary Amines using Ferricyanide as a Non-Toxic Cyanide Source
作者:Alexander M. Nauth、Nicola Otto、Till Opatz
DOI:10.1002/adsc.201500698
日期:2015.11.16
reaction of aromatictertiaryamines with potassium ferricyanide directly provides the useful α-amino nitriles. The inexpensive iron complex functions both as an oxidant and as a cyanidesource. The presence of molecular oxygen speeds up the reaction which can be performed in aqueous tert-butanol or even in ethanol-based mixtures like Tequila. While amine cyanations usually employ highly toxic cyanide sources
Reductive One Batch Synthesis of<i>N</i>-Arylpiperidines From Primary Amines and Glutaraldehyde
作者:Giancarlo Verardo、Angelo G. Giumanini、Grazia Favret、Paolo Strazzolini
DOI:10.1055/s-1991-26489
日期:——
The construction of the piperidine ring about an aromatic nitrogen atom, by a 5C + N reductive condensation reaction, using glutaraldehyde (pentanedial) and sodium borohydride in acidic water/methanol medium is described. The reaction is fast, affords good to excellent yields and appears insensitive to electronic effects and severe steric hindrance; it is found to be compatible with a large variety of aryl substituents, including nitro and oxo groups.