Multi-step reaction with 8 steps
1.1: SEC-BUTYLAMINE; isopropylamine / isopropyl alcohol / 35 °C / Supercritical conditions; Resolution of racemate
2.1: carbonochloridic acid 1-chloro-ethyl ester / 1,2-dichloro-ethane / 78 h / 70 °C / Reflux
3.1: N-ethyl-N,N-diisopropylamine / dichloromethane / 20 °C
3.2: 5 - 20 °C / Cooling with ice
4.1: lithium diisopropyl amide / tetrahydrofuran; hexane / 2 h / -78 - -71 °C
4.2: 2 h / -78 - -71 °C
5.1: hydrogenchloride / 1,4-dioxane / 25 h / 20 - 50 °C
6.1: potassium carbonate / acetonitrile / 0.33 h / 20 °C
6.2: 72 h / 20 °C
7.1: palladium diacetate; tert-butyl XPhos; caesium carbonate / tert-butyl alcohol / 5.5 h / 40 - 100 °C / Inert atmosphere
8.1: hydrogenchloride / water / 17 h / 93 - 96 °C
With
hydrogenchloride; SEC-BUTYLAMINE; carbonochloridic acid 1-chloro-ethyl ester; palladium diacetate; potassium carbonate; caesium carbonate; isopropylamine; N-ethyl-N,N-diisopropylamine; lithium diisopropyl amide; tert-butyl XPhos;
In
tetrahydrofuran; 1,4-dioxane; hexane; dichloromethane; water; 1,2-dichloro-ethane; isopropyl alcohol; acetonitrile; tert-butyl alcohol;