Separation of some aromatic amines by thin-layer chromatography

Chromatography

“…The latter have been found to give double zones in PC as well as cellulose TLC, which may be obviated by treating the cellulose with diazomethane (121). Occasionally, amines have been separated by TLC in the form of derivatives, such as the dimethylaminonapththalene-5-sulfonamides (1832) or dinitrophenyl derivatives (159,1811), but in most cases, TLC was applied to the uncombined amines-e.g., various aliphatic (677) and aromatic amines (636), long-chain tertiary amines (1122, 1526), quaternary ammonium compounds (117, 659,2211), catechol amines (299,1590,1598,1795,1823), longchain V-acetylethanolamines (2275), choline analogs (2067), sphingosine (2233), 4-dimethylaminoazobenzene metabolites (2095), and cyclohexylamine stereoisomers. In a few cases, aromatic amines have been chromatographed on columns of alumina (1100,1334), Teflon (765), or linear polyamides (256).…”