This work reports a green method for the synthesis of aryl selenocyanates via a three‐component reaction of arylboronicacids, Se powder, and trimethylsilyl cyanide (TMSCN) undermetal‐free and additive‐freeconditions. Remarkably, TMSCN acts as not only the substrate, but also the catalyst. Various selenaheterocycles can be also accessed with a catalytic amount of TMSCN.
Synthesis of Thio‐/Selenopyrrolines
<i>via</i>
SnCl
<sub>4</sub>
‐Catalyzed (3+2)‐Cycloadditions of Donor‐Acceptor Cyclopropanes with Thio‐/Selenocyanates
A highly efficient protocol for the synthesis of thio-/selenopyrrolines has been developed via a SnCl4-catalyzed (3+2)-cycloaddition of aryl thio-/selenocyanates with donor-acceptor cyclopropanes (DACs). The protocol rendered a variety of thio-/selenopyrrolines in good to excellent yields.