Multi-step reaction with 8 steps
1.1: tetrahydrofuran / 0.5 h / -70 - -45 °C
1.2: 18 °C
2.1: ethanol / 72 h / Reflux
3.1: hydrogenchloride / dichloromethane; 1,4-dioxane / 12 h / 20 °C
4.1: dmap; triethylamine / tetrahydrofuran / 0.08 h / 20 °C
5.1: dmap; triethylamine / tetrahydrofuran / 12 h / 20 °C
6.1: sodium hydroxide; ethanol / 12 h / 20 °C
6.2: pH 4
7.1: N-ethyl-N,N-diisopropylamine; O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate / dichloromethane / 2 h / 20 °C
8.1: trifluoroacetic acid / dichloromethane / 2 h / 20 °C
With
hydrogenchloride; dmap; ethanol; O-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate; triethylamine; N-ethyl-N,N-diisopropylamine; trifluoroacetic acid; sodium hydroxide;
In
tetrahydrofuran; 1,4-dioxane; ethanol; dichloromethane;
2.1: Bohlman-Rahtz Reaction;