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Reagents and conditions. (a) 1.2 equiv. Ar (Het)CH2Br, 1.2 equiv. NaH, rt, 40 min, 39–65%; (b) 1.1 equiv. NBS, 4°C, 16h, 76–90%; (c) 10 mol% Pd2(dba)3, 20 mol% PCy3, 1.1 equiv. Ar(Het)B(OH)2 or Ar(Het)B(OR)2, 1.7 equiv. K3PO4, dioxane/H2O, mw, 120°C, 30 min, 17–56%. U,V,W,X,Y,Z = CH or N. YD-3: U,V,W,X,Y = CH, Z = N, R2 = CH2COOCH2CH3.
