Dehydrogenative silylation of δ C–H bonds of heteroarenes^a.

^aUnless otherwise specified, reactions were conducted by pretreatment of a solution of 3 (0.5 mmol) and cat. B (5 mol%) in o-xylene (0.5 mL) at 120 °C for 6 h, and then tbe (1.5 equiv.) and Et₃SiH (3 equiv.) were added for further reaction.