1.1: tetrahydrofuran / 1 h / -78 - -70 °C 2.1: hydrogenchloride / methanol / 14 h / 20 °C 3.1: N-bromosuccinmide; 2,2'-azo-bisisobutyronitrile / tetrachloromethane / 0.75 h / |Reflux 4.1: silver perchlorate / tetrahydrofuran / 20 °C / |Inert atmosphere 5.1: toluene-4-sulfonic acid / tetrahydrofuran / 12 h / 0 - 20 °C 6.1: n-butyllithium / tetrahydrofuran / 0.07 h / -78 °C / |Inert atmosphere 6.2: -78 - 20 °C / |Inert atmosphere 7.1: 4-(N,N-dimethlyamino)pyridine; pyridine / 20 °C 8.1: AlCl3, aluminium chloride / nitromethane / 0.5 h / 60 °C / |Acidic conditions; |Microwave irradiation View Scheme