potassium hydride in tetrahydrofuran; mineral oil T=60°C; 1 h;

1: triethylamine / dichloromethane / 4 h / 0 - 20 °C 2: potassium hydride / tetrahydrofuran; mineral oil / 1 h / 60 °C View Scheme

1: hydrogen bromide / hexane; acetic acid / 1 h / 0 - 20 °C 2: oxalyl dichloride; N,N-dimethyl-formamide / dichloromethane / 0 - 20 °C 3: triethylamine / dichloromethane / 4 h / 0 - 20 °C 4: potassium hydride / tetrahydrofuran; mineral oil / 1 h / 60 °C View Scheme

1: oxalyl dichloride; N,N-dimethyl-formamide / dichloromethane / 0 - 20 °C 2: triethylamine / dichloromethane / 4 h / 0 - 20 °C 3: potassium hydride / tetrahydrofuran; mineral oil / 1 h / 60 °C View Scheme

Hg(II)-EDTA in dichloromethane 14 h; HeatingpH 8.0; Yield given. Yields of byproduct given. Title compound not separated from byproducts;

in ethanol; cyclohexane 0.75 h; Irradiation; Yield given;