A metal-free three-component coupling reaction of alkynes, Se powder and epoxides is described for the first time. This reaction provides an efficient and straightforward route for the preparation of alkynyl alkyl selenides via a double C–Se bond formation process. Preliminary investigations revealed that elemental Se played a dual role, first serving as an oxidant with the resulting selenide anion then reacting with epoxides to form an active dialkyl diselenide intermediate.

中文翻译：

---

通过末端炔烃，硒和环氧化物的三组分偶联，无金属合成炔基烷基硒化物

首次描述了炔烃，硒粉和环氧化物的无金属三组分偶联反应。该反应为通过双C-Se键形成过程制备炔基烷基硒化物提供了一条有效而直接的途径。初步研究表明，元素硒起着双重作用，首先与所得硒化物阴离子起氧化剂作用，然后与环氧化物反应形成活性二烷基二硒化物中间体。