Facile and Selective Synthesis of Propargylic Amines and 1,6-Diynes: One-Pot Three-Component Coupling Reactions of Alkynylsilanes, Aldehydes and Amines by a Cooperative Catalytic System Comprised of CuCl and Cu(OTf)2
摘要:
Described herein is a three-component coupling reaction of alkynylsilanes, aldehydes and amines by a cooperative catalytic system comprised of CuCl and Cu(OTf)(2), leading to the production of a variety of propargyl amine derivatives. This catalytic system was successfully applied to the practical preparation of 1,6-diyne derivatives via twice-performed, domino-type coupling reactions.
Various substituted 1,3‐thiazolidin‐2‐ones can be synthesized by using a tBuOK‐mediated carbonylativecyclization of propargylicamines with elemental sulfur. Benzene‐1,3,5‐triyl triformate (TFBen) serves as a convenient CO surrogate.
We report here a new carbonylative procedure for the cyclization of propargylicamines with elemental selenium (Se). By using tBuOK as the promoter, various 1,3‐selenazolidin‐2‐ones were produced without the usage of toxic CO gas. Benzene‐1,3,5‐triyl triformate (TFBen) was employed as a safe and convenient CO surrogate here, and a broad class of substrates (29 examples) were effectively transformed