Preparation of chalcogen-containing heterocycles using isoselenocyanates and their relatives

(1)研究了几种具有三键或专用离去基的亲核试剂与异硒氰酸酯及其亲缘化合物的环加成。(2)具有三键（或离去基）的异硒氰酸酯与一些亲核试剂进行了环加成反应。用这两种方法有效地合成了含硫元素（Se， S, Te）的新型杂环。对其应用和功能（结构和反应性）进行了研究。此外，这些底物和亲核试剂的碘环化被集中在得到更功能化的产物。还发现了二硫族化合物的新型碘环化反应，以制备含硫元素的杂环。

(1) The cycloaddion of several nucleophiles having a triple bond or an appropriative leaving group with the isoselenocyanates and the relatives was examined. (2) The cycloaddion of the isoselenocyanates having a triple bond (or a leaving group) with some nucleophiles was also carried out. The novel heterocycles containing a chalcogen element (Se, S, Te) were effectively obtained by these two original methods. The application and functionalities (structure and reactivity) were studied. Furthermore, the iodocyclization of these substrates and the nucleophiles was focused to give more functionalized products. The novel iodocyclization of the dichalcogenides was also found to prepare the heterocycles containing a chalcogen element.