1.1: N-bromosuccinmide; dibenzoyl peroxide / tetrachloromethane / 4 h / |Reflux 2.1: acetone; water / 12 h / |Reflux 3.1: lithium aluminium tetrahydride / tetrahydrofuran 4.1: sodium hydride / mineral oil; N,N-dimethyl-formamide / 0.33 h 4.2: 4 h / 20 °C View Scheme

1: N-bromosuccinmide; dibenzoyl peroxide / tetrachloromethane / 4 h / |Reflux 2: acetone; water / 12 h / |Reflux 3: lithium aluminium tetrahydride / tetrahydrofuran View Scheme