Preparation of new nitrogen-bridged heterocycles. XIV Further investigation of the desulfurization and the rearrangement of pyrido [1, 2-d]-1, 3, 4-thiadiazine …

A KAKEHI, S ITO, K NAGATA, N KINOSHITA…

Index: Kakehi, Akikazu; Ito, Suketaka; Nagata, Kenji; Kinoshita, Naosumi; Kakinuma, Noboru Chemical & Pharmaceutical Bulletin, 1987 , vol. 35, # 1 p. 156 - 169

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Citation Number: 15

Abstract

The formation of pyrazolo [1, 5-a] pyridine derivatives via the desulfurization and the rearrangement of pyrido [1, 2-d]-1, 3, 4-thiadiazine intermediates having various substituents at the 2-and 4-positions was investigated, and the wide applicability of this approach to the syntheses of pyrazolo [1, 5-a] pyridines was established. The substituent effect in these reactions was also clarified. The possibility of the extension of this reaction to other ...