Boc Groups as Protectors and Directors for Ir-Catalyzed C-H Borylation of Heterocycles

Ir-catalyzed C-H borylation is found to be compatible with Boc protecting groups. Thus, pyrroles, indoles, and azaindoles can be selectively functionalized at C-H positions beta to N. The Boc group call be removed on thermolysis or left intact during subsequent transformations.