Zirconium-Mediated Multi-Component Reactions of Conjugated 1,3-Butadiynes or Monoynes with Acyl Cyan

来源 :The 24th International Society of Heterocyclic Chemistry Con | 被引量 : 0次 | 上传用户:bluefireyang
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Recently our group reported the first example of addition of two molecules of aldehyde to zirconium-butadiyne complexes to yield the cis-[3]cumulenic diols.[1] Here we would like to report new reaction patterns of zirconocene-butadiyne or-monoyne complexes toward acyl cyanide derivatives which provide a series of functionalized heterozirconacycles via multi-component reactions in one pot.[2] Protonolysis of the corresponding metallacycles allows for readily access to diverse substituted 1,4-benzodiazepin-2-ones or novel oxazolo[5,4-b]pyridine derivatives.
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