Tellur(II)/Tellur(III)‐katalysierte dehydrierende C‐N‐Bindungsbildung

The Te(II)/Te(III) catalyzed dehydrogenative C─H phenothiazination of challenging phenols featuring electron withdrawing substituents is herein described, under mild aerobic conditions and with high yields. These unexpected Te(II)/Te(III) radical catalytic properties were characterized by cyclic voltammetry, EPR spectroscopy, kinetic experiments and DFT calculations.