pyridinium chlorochromate in dichloromethane 6.5 h; Ambient temperature;

1: AlCl3, aluminium chloride / tetrachloromethane 2: selenium(IV) oxide; acetic acid / |Heating 3: N-bromosuccinmide 4: acetic acid; potassium acetate / |Heating 5: pyridinium chlorochromate / dichloromethane View Scheme

1: With pyridinium chlorochromate in dichloromethane 2: With sodium acetate in acetonitrile

1: AlCl3, aluminium chloride / tetrachloromethane 2: selenium(IV) oxide; acetic acid / |Heating 3: N-bromosuccinmide 4: acetic acid; potassium acetate / |Heating 5: pyridinium chlorochromate / dichloromethane View Scheme