E. Negishi et al., J. Org. Chem. 42, 1821 (1977).
Formation of unsymmetric biaryls by cross coupling arylhalides with arylzinc reagents in presence of catalytic Ni or Pd:

Synthetic application: S. Superchi et al., Tetrahedron Lett. 37, 6057 (1996); J. A. Miller, R. P. Farrell, ibid. 39, 6441 (1998). Extension to additional functional groups: E. Negishi, Acc. Chem. Res. 15, 340 (1982). Review: P. Knochel, R. D. Singer, Chem. Rev. 93, 2117-2188 (1993); idem et al., Ber. 130, 1021-1027 (1997).