1.1: triethylamine / 8 h / Reflux 2.1: 4-(N,N-dimethlyamino)pyridine / dichloromethane / 18 h / 0 - 20 °C 3.1: hydrogen; zinc dibromide / palladium 10 on activated carbon / ethyl acetate / 48 h / 20 °C 4.1: potassium tert-butylate / tetrahydrofuran / 3 h / 5 - 20 °C 4.2: 0.17 h View Scheme

thionyl chloride; triethylamine in dichloromethane T=32°C;

sulfuric acid; nitric acid in acetic acid 0 deg C up to r.t.;

1: aluminium isopropylate 2: phosphorus (V)-chloride; chloroform View Scheme

sodium azide in ethanol 6 h; Heating;