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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

✍ Scribed by M. Kožul; Z. Stiplošek; Z. Orhanović; K. Jakopčić; A. Nagl; A. Hergold-Brundić

Publisher
Journal of Heterocyclic Chemistry
Year
1999
Tongue
English
Weight
468 KB
Volume
36
Category
Article
ISSN
0022-152X

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✦ Synopsis

Abstract

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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## Abstract An influence of a structure of the amine (benzylamine, __N__‐methyl‐benzylamine, __N__‐isopropyl‐benzylamine, __N__‐methyl‐butylamine, __N__‐ethyl‐butylamine, __sec__‐butylamine, and __tert__‐butylamine) on a rate constant of the ring‐opening reaction of 4‐benzylidene‐2‐methyl‐5‐oxazolo