Manganese-catalyzed synthesis of monofluoroalkenes via C–H activation and C–F cleavage.

The manganese-catalyzed α-fluoroalkenylation of arenes via C–H activation and C–F cleavage has been described. This protocol provides a very useful method for the synthesis of monofluoroalkenes with predominant unconventional E-isomer selectivity which complements the existing strategies for the access to these molecular architectures. In addition, the selectivity of β-defluorination in the catalytic cycle not only determines the configurations of the products but also obviates the use of external oxidants, providing a good example in the exploitation of manganese-catalyzed redox-neutral C–H transformations. [ABSTRACT FROM AUTHOR]