Heterocyclic Studies. III. A Ring Closure Reaction of Diazoacetylpyrazolines

JA Moore, RW Medeiros

文献索引：Moore; Medeiros Journal of the American Chemical Society, 1959 , vol. 81, p. 6026

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被引用次数: 19

摘要

The product obtained by treating the diazoacetylpyrazolines I1 and I11 with warm acetic acid or the intermediate bicyclic ketone VI1 with very dilute mineral acid or alkali is an orange- colored, feebly acidic compound with absorption maxima of, respectively, decreasing intensities at 235, 312 and 403 mp, and infrared absorptions at 3.05 and 6.05 p. These spectra require a rather highly conjugated unsaturated carbonyl system which could not ...