Direct preparation of tertiary amines in which two substituents are aromatic is described.
In the presence of either the inorganic base sodium tert-butoxide or the sterically hindered organic base diisopropylethylamine, the alkylation
of secondary diarylamines is achieved smoothly. In contrast to methods previously
reported in the literature, this procedure is high-yielding and does not require the
use of transition-metal catalysts or functional-group-intolerant hydride reductants.
Key words
tertiary amines - DIPEA - alkylation - benzyl halides