Multi-step reaction with 9 steps
1.1: hydrogenchloride; sodium nitrite / water; ethanol / -5 - 0 °C
2.1: hydrogen / methanol / 4 h / 20 °C / 2250.23 Torr / Autoclave
3.1: 1H-imidazole / tetrahydrofuran / 4 h / 20 °C
4.1: triethylamine / 1,2-dichloro-ethane / 20 °C
4.2: AMBERLITE? IR-400 / 16 h / 20 °C
5.1: caesium carbonate / 1,2-dichloro-ethane / 16 h / 60 °C
6.1: hydrogenchloride / water; methanol / 0 - 20 °C
7.1: potassium carbonate / N,N-dimethyl-formamide / 12 h / 80 °C
8.1: CHIRALCEL? OD-H column / ethanol; hexane / Resolution of racemate
9.1: triethylamine / dichloromethane / 16 h / 20 °C
With
1H-imidazole; hydrogenchloride; hydrogen; potassium carbonate; caesium carbonate; triethylamine; sodium nitrite;
In
tetrahydrofuran; methanol; ethanol; hexane; dichloromethane; water; 1,2-dichloro-ethane; N,N-dimethyl-formamide;