Entry

Pd catalyst^b)

Ligand^c)

Base

Solvent

1

Pd(OAc)₂

PCy₃∙HBF₄

K₂CO₃

Toluene

2

Pd(OAc)₂

PCy₃·HBF₄

K₂CO₃

DMAc

3

Pd(OAc)₂

PCy₃·HBF₄

K₂CO₃

THF

4

Pd(OAc)₂

PtBu₂Me·HBF₄

K₂CO₃

DMAc

5

Herrman

PCy₃·HBF₄

K₂CO₃

DMAc

6

Pd(dba)₂

P(o-MeOPh)₃

Cs₂CO₃

THF