Multi-step reaction with 8 steps
1: AcOH; H2 / Pd/C / 20 h / 20 °C / 3051.17 Torr
2: aq. NaOH / dioxane / 1 h / 0 - 20 °C
3: 3,4-dihydro-3-hydroxy-4-oxo-1,2,3-benzotriazine; 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride; 4-methylmorpholine / dimethylformamide; CH2Cl2 / cooling
4: H2 / Pd/C / ethanol / 3 h / 20 °C
5: 2.60 g / 3,4-dihydro-3-hydroxy-4-oxo-1,2,3-benzotriazine; 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride; 4-methylmorpholine / dimethylformamide; CH2Cl2
6: aq. HCl / ethyl acetate; dioxane / 0.25 h / 20 °C
7: 3,4-dihydro-3-hydroxy-4-oxo-1,2,3-benzotriazine; 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride; 4-methylmorpholine / dimethylformamide; CH2Cl2 / cooling
8: 1,1,1-tris(acetyloxy)-1,1-dihydro-1,2-benziodoxol-3(1H)-one / CH2Cl2 / 20 °C
With
4-methyl-morpholine; hydrogenchloride; sodium hydroxide; hydrogen; Dess-Martin periodane; acetic acid; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; 3-hydroxy-3,4-dihydrobenzotriazine-4-one;
palladium on activated charcoal;
In
1,4-dioxane; ethanol; dichloromethane; ethyl acetate; N,N-dimethyl-formamide;
8: Dess-Martin oxidation;
DOI:10.1021/jm050323b