entry catalyst ligand solvent yield (%)b
1 Pd2(dba)3 L1 DCM ND
2 Pd2(dba)3 L2 DCM ND
3 Pd2(dba)3 L3 DCM 91
4 Pd2(dba)3 L4 DCM 89
5 Pd2(dba)3 L5 DCM 87
6c Pd(PPh3)4 - DCM 95
7c Pd(PPh3)4 - DCE 93
8c Pd(PPh3)4 - THF 94
9c Pd(PPh3)4 - toluene 72
10d Pd(PPh3)4 - DCM 95
11e Pd(PPh3)4 - DCM 95 (95)g
12f Pd(PPh3)4 - DCM 88