1.1: potassium carbonate / water; isobutyl methylketone / 2 h / 130 °C / sealed autoclave reactor 1.2: 0.5 h / 70 °C / pH 3 - 4 1.3: 180 °C / sealed autoclave reactor 2.1: potassium hydroxide / water; dimethyl sulfoxide / 3 h / 95 °C 3.1: 3-chloro-benzenecarboperoxoic acid / dichloromethane / 2 h / 35 °C 4.1: bismuth trifluoromethanesulphonate / dichloromethane / 2 h / 20 - 25 °C View Scheme

1: potassium hydroxide / water; dimethyl sulfoxide / 3 h / 95 °C 2: 3-chloro-benzenecarboperoxoic acid / dichloromethane / 2 h / 35 °C 3: bismuth trifluoromethanesulphonate / dichloromethane / 2 h / 20 - 25 °C View Scheme

sodium tetrahydroborate

1: With Oxonereg; in N,N-dimethyl-formamide T=20 - 55°C; 1 h; 2: With water in N,N-dimethyl-formamide