1.1: 2,6-dimethylpyridine / dichloromethane / 0.5 h / 0 °C / |Inert atmosphere 2.1: 9-bora-bicyclo[3.3.1]nonane / tetrahydrofuran / 5 h / 0 - 23 °C / |Inert atmosphere 2.2: 15.5 h / 0 - 23 °C / pH 7 / |Inert atmosphere 3.1: potassium tert-butylate / tetrahydrofuran / 0.5 h / 0 °C / |Inert atmosphere View Scheme

1.1: ThexylBH2 / tetrahydrofuran / 2.67 h / 0 °C / |Inert atmosphere 1.2: 16 h / 0 - 23 °C / pH 7 / |Inert atmosphere 2.1: 1H-imidazole; 4-(N,N-dimethlyamino)pyridine / N,N-dimethyl-formamide / 2 h / 40 °C / |Inert atmosphere 3.1: acetic acid / methanol; tetrahydrofuran; water / 5 h / 0 °C 4.1: potassium tert-butylate / tetrahydrofuran / 0.5 h / 0 °C / |Inert atmosphere View Scheme