1: N,N-dimethyl-formamide / 1 h / 80 °C 2: lithium hydroxide hydrate / tetrahydrofuran; methanol; water / 1 h / 20 °C 3: silica gel; pyridinium chlorochromate / dichloromethane / 2 h / 20 °C View Scheme

1: lithium hydroxide hydrate / tetrahydrofuran; methanol; water / 1 h / 20 °C 2: silica gel; pyridinium chlorochromate / dichloromethane / 2 h / 20 °C View Scheme

1: triethylamine / dichloromethane / 0.17 h / 0 °C 2: ammonium hydroxide / 0.03 h / 0 °C 3: 2,4,6-trichloro-1,3,5-triazine / N,N-dimethyl-formamide / 0 - 20 °C 4: N-bromosuccinmide; dibenzoyl peroxide / tetrachloromethane / 16 h / Reflux; Inert atmosphere 5: N,N-dimethyl-formamide / 1 h / 80 °C 6: lithium hydroxide hydrate / tetrahydrofuran; methanol; water / 1 h / 20 °C 7: silica gel; pyridinium chlorochromate / dichloromethane / 2 h / 20 °C View Scheme

1: 2,4,6-trichloro-1,3,5-triazine / N,N-dimethyl-formamide / 0 - 20 °C 2: N-bromosuccinmide; dibenzoyl peroxide / tetrachloromethane / 16 h / Reflux; Inert atmosphere 3: N,N-dimethyl-formamide / 1 h / 80 °C 4: lithium hydroxide hydrate / tetrahydrofuran; methanol; water / 1 h / 20 °C 5: silica gel; pyridinium chlorochromate / dichloromethane / 2 h / 20 °C View Scheme

1: N-bromosuccinmide; dibenzoyl peroxide / tetrachloromethane / 16 h / Reflux; Inert atmosphere 2: N,N-dimethyl-formamide / 1 h / 80 °C 3: lithium hydroxide hydrate / tetrahydrofuran; methanol; water / 1 h / 20 °C 4: silica gel; pyridinium chlorochromate / dichloromethane / 2 h / 20 °C View Scheme