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Construction of Carbon Skeletons by Transition Metal-Catalyzed Regio- and Stereoselective Addition of Carbon-Chalcogen Bonds to Alkynes and Allenes

机译:通过过渡金属催化的碳骨架施工碳骨架和立体选择性加入碳 - 硫醇键与炔烃和艾伦

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Transition metal-catalyzed addition of carbon-heteroatom bonds (represented as "C" and "E", respectively) to alkynes or allenes is one of the most promising routes to highly substituted alkenes. Since the introduced heteroatom functionality can be subjected to further manipulation, products would be useful building blocks in organic synthesis. Here we wish to report novel methods for the construction of carbon skeletons by addition of carbon-chalcogen (sulfur or selenium) bonds to alkynes or allenes: i) Pd(0) or Pt(0)-catalyzed intramolecular carbochalcogenation of alkynes giving rise to various carbocycles having an exo-methylene moiety, ii) Pd(0)-catalyzed inter- and intramolecular acylselenation of allenes leading to the regioselective formation of functionalized allyl selenides.
机译:过渡金属催化的碳 - 杂原子键(分别为“C”和“E”)分别为炔或丙烯醚是最有前途的高度取代烯烃的途径之一。由于介绍的杂原子功能可以进行进一步的操纵,因此产品将是有机合成中有用的结构块。在这里,我们希望通过将碳 - 硫曲根(硫或硒)键加入炔或烯烷烃:I)Pd(0)或Pt(0) - 催化分子内碳化碳化碳化碳基催化剂的碳胆碱(硫化物或硒)键来报告碳骨架的新方法具有外甲基部分,II)Pd(0)的各种碳缩乳 - 催化和分子内酰基硅烷化,导致官能化烯丙基硒化物的区域选择性形成。

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