Multi-step reaction with 11 steps
1.1: pyridine; CrO3; Ac2O / molecular sieves 4 Angstroem / CH2Cl2 / 2 h / 20 °C
2.1: 5.16 g / pyridine; hydroxylamine hydrochloride / 14 h / 20 °C
3.1: 3.34 g / aq. TFA / 0.33 h / 0 °C
4.1: 82 percent / NaBH4; AcOH / 2 h / 5 °C
5.1: H2 / Pd/C / acetic acid; H2O / 20 h / 20 °C
6.1: 2.22 g / Na2CO3 / tetrahydrofuran; H2O / 2 h / 20 °C
7.1: TMSCl; pyridine / 0.5 h / 20 °C
7.2: pyridine / 2 h / 20 °C
7.3: aq. NH3 / H2O / 0.5 h / 20 °C
8.1: pyridine / 20 h / 20 °C
9.1: 1.62 g / NaN3; NH4Cl / dimethylformamide / 1 h / 80 °C
10.1: 85 percent / TFA / CH2Cl2 / 40 h / 20 °C
11.1: 93 percent / Na2CO3 / tetrahydrofuran; H2O / 0 - 20 °C
With
pyridine; chromium(VI) oxide; sodium tetrahydroborate; chloro-trimethyl-silane; sodium azide; hydroxylamine hydrochloride; hydrogen; acetic anhydride; sodium carbonate; ammonium chloride; acetic acid; trifluoroacetic acid;
palladium on activated charcoal; 4 A molecular sieve;
In
tetrahydrofuran; dichloromethane; water; acetic acid; N,N-dimethyl-formamide;
DOI:10.1016/S0040-4020(01)01185-1