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. Author manuscript; available in PMC: 2009 Sep 1.
Published in final edited form as: J Am Chem Soc. 2005 Jun 22;127(24):8644–8651. doi: 10.1021/ja0430346

Scheme 1.

Scheme 1

(a) Conditions: 1.0 equiv 1a, 1.2 equiv 4-Ph(C6H4)Br, 1.4 equiv NaOtBu, 1 mol % Pd2(dba)3, 4 mol % P(o-tol)3, toluene, 110 °C. Isolated yield: 2 (19%), 3 (32%), 4 (5%), 5 (12%) for Ar = 4-methoxyphenyl, Ar1 = 4-(phenyl)phenyl.