Synthesis and Minisci Reactions of Organotrifluoroborato Building Blocks

Copper-catalyzed borylation of a variety of organic halides with bis­(pinacolato)­diboron allows the preparation of diverse potassium organotrifluoroborates. The reactions are mild and general, providing access to a variety of interesting, boron-containing building blocks, including those containing piperidine, pyrrole, azetidine, tetrahydropyran, and oxetane substructures. Representative Minisci reactions are reported for select examples.