Chemistry Letters

A novel ethynylation of pyridines by Reissert-Henze type reaction.

N Nishiwaki, S Minakata, M Komatsu, Y Ohshiro

文献索引：Nishiwaki, Nagatoshi; Minakata, Satoshi; Komatsu, Mitsuo; Ohshiro, Yoshiki Chemistry Letters, 1989 , p. 773 - 776

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被引用次数: 12

摘要

W6 GwmmnyLamm,1989 In all cases, the substitution occurred at 2— or 6—position and not at 4— position. Electron—withdrawing substituents raised the yields of ethynyl— pyridines. It was found that hitherto unknown polyfunctionalized ethynylpyridines can be easily prepared by this method.5) When the 3—substituted pyridine N—oxides were used as substrates, ethynyla— tion occurred at 2- and 6—positions, but 2—ethynylation was predominant in ...