Nickel (0)-catalyzed [2+ 2] annulation of electron-deficient allenes. Highly regioselective synthesis of cyclobutanes

…, K Hirayama, C Kabuto, Y Yamamoto

文献索引：Saito, Shinichi; Tanaka, Tadashi; Koizumi, Toru; Tsuboya, Norie; Itagaki, Hitoshi; Kawasaki, Taishi; Endo, Shota; Yamamoto, Yoshinori Journal of the American Chemical Society, 2000 , vol. 122, # 8 p. 1810 - 1811

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被引用次数: 45

摘要

The nickel-catalyzed [2+ 2] annulations of electron-deficient allenes proceed efficiently in a highly regioselective manner under very mild conditions to give the head-to-head cyclodimerization products, bismethylenecyclobutanes, as single isomers in good to fair yields. We also carried out the stoichiometric reaction of these allenes in the presence of Ni (0) complexes and elucidated the mechanism of this highly selective reaction.