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The title formamidicine reacts with ArCHO (where Ar = Ph, 4-MeC6H4, 4-MeOC6H4, 4-FC6H4) and acetone in the presence of a base to give products, shown by X-ray crystallography (Ar = Ph), to be the title compounds 4a–e
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Alves et al. (1993) studied this question.
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