Thermochemical study on the ring closure reaction of 5-morpholino-4-vinylpyridazinones by tert-amino effect (original) (raw)

Abstract

Cyclization of tert-anilines with a properly substituted vinyl moiety by the tert-amino effect affords fused pyridines. This type of ring closure reaction of 5-morpholino-4-vinylpyridazinones and a benzene analogue was investigated by differential scanning calorimetry (DSC) measurements. The structure of products was confirmed by spectroscopic and microanalytical methods. The enthalpy values and heats of reactions were obtained from the thermograms by

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