1.1: sodium hydride / N,N-dimethyl-formamide; mineral oil / 1 h / 0 °C / |Inert atmosphere; |Schlenk technique 1.2: 2 h / 0 - 20 °C / |Inert atmosphere; |Schlenk technique 2.1: trifluoroacetic acid / dichloromethane / 4 h / 20 °C / |Inert atmosphere; |Schlenk technique 3.1: potassium phosphate; tris(dibenzylideneacetone)dipalladium(0) chloroform complex / tert-butyl alcohol / 5 h / 110 °C / |Schlenk technique; |Inert atmosphere View Scheme