c]thiophene Series. -Three new bisbenzamide derivatives (IX) in benzo[c]thiophene series are synthesized via the common intermediate (VIII). Direct conversion of diketone (I) with P4S10 results in formation of (X) which is extremely unstable and decomposes rapidly. -(KOZUL, M.; STOLIC, I.; ZINIC, B.; BAJIC*, M.; Croat. Chem. Acta 78 (2005) 4, 551-555; Dep.
Unlike most of other aromatic amines, 4‐methoxyaniline with methyl comenate (1) in the mixture of acetic acid and methanol (1:1) gave two unexpected products with azomethyne moiety. The structures of new compounds were determined from their characteristic spectroscopic behaviour and were confirmed by X‐ray crystallographic measurements.
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New Compounds in the Reaction of Aromatic Amines and 5-Hydroxy-4-pyrone-2-carboxylate. The Influence of a Methoxy Group.-Two unexpected compounds with azomethine moiety, (III) and (IV), are obtained in the reaction of methyl comenate (I) with anisidine (II). The proof of their structures is performed by X-ray diffraction measurement. A reaction mechanism similar to the usual mechanism of 4-pyrone to 4-pyridone transformations is suggested. -(KOZUL, M.; STIPLOSEK, Z.; ORHANOVIC, Z.; JAKOPCIC, K.; NAGL, A.; HERGOLD-BRUNDIC, A.; J.
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