We report a highly enantioselective Cu(I)-catalyzedazide-alkynecycloaddition via asymmetric desymmetrization of oxindole-based 1,6-heptadiynes, which furnishes quaternary oxindoles bearing a 1,2,3-triazole-containing moiety with 84-98% ee.
我们报告了通过基于羟吲哚的 1,6-庚二炔的不对称去对称化的高度对映选择性的 Cu(I) 催化的叠氮化物-炔烃环加成反应,该反应提供了带有 1,2,3-三唑部分的四元羟吲哚和 84-98% ee .
Palladium-catalyzed silaborative carbocyclizations of 1,6-diynes
An addition/cyclization reaction of 1,6-diynes was developed for the synthesis of highly substituted 1,2-dialkylidenecycloalkanes. In this work, 1,6-diynes reacted with (dimethylphenylsilyl)pinacol-borane in the presence of a palladium catalyst to afford 1,2-dialkylidenecycloalkanes bearing silyl and boryl groups with a (Z,Z)-configuration in good to excellent yields. Moreover, the corresponding products