Synthesis of 2,6-disubstituted and 2,3,6-trisubstituted anilines
摘要:
A number of 2,6-disubstituted and 2,3,6-trisubstituted anilines have been prepared via the selective para dehalogenation of the corresponding anilines. Modification of the substituents on the amino nitrogen demonstrates that the selectivity is derived from steric rather than electronic effects. The effects of the choice of formate hydrogen donor, Pd catalyst, solvent, and temperature upon the efficiency and selectivity of the dehalogenation are discussed.
An intriguing effect of lithium perchlorate dispersed on silica gel in the bromination of aromatic compounds by <i>N</i>-bromosuccinimide
作者:Mojtaba Bagheri、Najmedin Azizi、Mohammad R Saidi
DOI:10.1139/v05-001
日期:2005.2.1
A convenient and efficient procedure for electrophilic aromatic bromination has been developed by mixing of N-bromosuccinimide and an aromatic compound at room temperature on the surface of silica ...
The reaction of aromatic amines with benzyltrimethylammonium tribromide in dichloromethane–methanol containing calcium carbonate powder for 0.5 h at room temperature gave bromo-substituted aromatic amines in good yields.