Abstract
It was revealed from our previous investigation that the product obtained from the reaction of dimethyl imidazole-4, 5-dicarboxylate (Ia) with anethole (II) is not a Diels-Alder type adduct (III), as proposed by Lora-Tamayo, et al., but probably a heterocyclic compound (VI). The structure of this product is assumed from the basis of its chemical behavior and spectral data. Similar treatment of Ia with butoxyethylene (IV) as in the case of II afforded dimethyl 1-(1-butoxyethyl)imidazole-4, 5-dicarboxylate (V). The evidence for this structure assignment is described.
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