The need to use a static directing group represents a major limitation for the emerging
field of ortho-selective C–H activation and functionalization. Chemistry was recently developed
that allowed partial removal or minor transformations for certain directing groups.
Our recent work demonstrated that triazenes were a class of excellent directing groups
for C–H activation/functionalization, and subsequent chemical manipulations generated
key compounds with synthetic versatility.
Key words
C–H activation - directing groups - transition metals - catalysis - protecting groups