Multi-step reaction with 10 steps
1.1: hydrogenchloride; tin / ethanol / 3 h / Reflux
2.1: methanesulfonic acid / tetrahydrofuran / 2 h / 50 °C
3.1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / toluene / 2 h / 80 °C
4.1: sodium tetrahydroborate / dichloromethane; methanol / 2 h / 20 °C
5.1: pyridine / 2 h / 0 - 20 °C / Inert atmosphere
6.1: sodium azide / N,N-dimethyl-formamide / 6 h / 60 °C / Inert atmosphere
7.1: XPhos; tris-(dibenzylideneacetone)dipalladium(0); potassium phosphate tribasic trihydrate / 1,4-dioxane; water / 2 h / 90 °C / Inert atmosphere
8.1: hydrogen; 5%-palladium/activated carbon / methanol / 20 °C / 1551.49 Torr
9.1: pyridine / dichloromethane / 20 °C / Inert atmosphere
9.2: 1.5 h / 20 °C / Inert atmosphere
10.1: Chiralpak AD-3 / ethanol / Resolution of racemate
With
pyridine; hydrogenchloride; tin; sodium tetrahydroborate; tris-(dibenzylideneacetone)dipalladium(0); sodium azide; methanesulfonic acid; potassium phosphate tribasic trihydrate; 5%-palladium/activated carbon; hydrogen; 2,3-dicyano-5,6-dichloro-p-benzoquinone; XPhos;
In
tetrahydrofuran; 1,4-dioxane; methanol; ethanol; dichloromethane; water; N,N-dimethyl-formamide; toluene;