S1 Supporting Information File 1 for Combined directed ortho-zincation and palladium- catalyzed strategies: Synthesis of 4,n-dimethoxy- substituted benzo[b]furans Verónica Guilarte, M. Pilar Castroviejo, Estela Álvarez and Roberto Sanz* Address: Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001 Burgos, Spain Email: Roberto Sanz* - rsd@ubu.es * Corresponding author Experimental and analytical data