Absent from the catalytic systems noted in the preceding paragraph are examples of the intermolecular hydroarylation of unactivated alkenes with electron-rich arenes such as indoles. Rather, hydroarylation of alkenes with indoles requires either an electron-deficient Michael acceptor 1 or prolonged heating under highly acidic conditions. 10 We recently reported effective Pt(II)-catalyzed protocols for the intramolecular hydroarylation of unactivated alkenes with indoles 11,12 and for the ...