Acid??catalyzed reactions of 3??(hydroxymethyl)??and 3??(1??hydroxyethyl) pyrazolo [1, 5??a] pyridines

Y Miki, N Nakamura, H Hachiken…

Index: Miki, Yasuyoshi; Nakamura, Noriko; Hachiken, Hiroko; Takemura, Shoji Journal of Heterocyclic Chemistry, 1989 , vol. 26, p. 1739 - 1745

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Citation Number: 17

Abstract

Abstract Treatment of 3-(hydroxymethyl) pyrazolo [1, 5-a] pyridines with trifluoroacetic acid in refluxing dichloro-methane led to the formation of bis (pyrazolo [1, 5-a] pyrid-3-yl) methanes or bis [(pyrazolo [1, 5-a] pyrid-3-yl)]-methyl ethers depending upon the concentration of trifluoroacetic acid. In contrast, similar treatment of 3-(1-hydroxyethyl) pyrazolo [1, 5-a] pyridines gave a mixture of 3-vinylpyrazolo [1, 5-a] pyridines and 1, 3-bis (pyrazolo-[1, 5-a] ...