We describe a general and efficient transition-metal
free C–C
bond cross-coupling of (hetero)aryl ethers and diarylmethanes via
C(sp2)–O bond cleavage. The coupling reactions mediated
by KHMDS proceeded well with high efficiency, broad substrate scope,
and good functional group tolerance. The robustness and practicability
of this protocol also have been demonstrated by easy gram-scale preparation
and diversified product derivatization.