Abstract
Perimidine-2-carbaldehyde
has been prepared and found to consist of a mixture of the free aldehyde (1a)
and the dimeric cyclic hemiaminal (2) in the solid state. This dimerization is
analogous to that observed in many N-unsubstituted azole aldehydes. The aldehyde
(1a) initially forms as the hydrate (1c) on hydrolysis of its diethyl acetal. ��� The condensation of imidates or imidate
salts with 1,8- diaminonaphthalene is a useful route
to 2-substituted perimidines or their salts.
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