Multi-step reaction with 9 steps
1.1: 89 percent / TsOH / dimethylformamide; methanol / 2 h / 70 °C
2.1: 68 percent / NaCNBH3; HCl; 3 Angstroem molecular sieves / tetrahydrofuran; diethyl ether / 0.08 h / 20 °C
3.1: DMSO; Ac2O / 18 h / 20 °C
4.1: NaBH4 / ethanol; H2O / 1 h / 20 °C
5.1: 81 percent / ZnCl2; AgClO4; 4 Angstroem molecular sieves / dioxane; toluene / 22 h / 20 °C
6.1: 75 percent / acetic acid; water / ethane-1,2-diol / 0.25 h / Heating
7.1: 82 percent / pyridine / 20 h / 20 °C
8.1: (Me3Si)2NH; Me3SiCl / Heating
8.2: 61 percent / TMSOTf / 1,2-dichloro-ethane / Heating
9.1: NH3; water / methanol / 20 h / 20 °C
With
pyridine; hydrogenchloride; sodium tetrahydroborate; chloro-trimethyl-silane; 3 A molecular sieve; 4 A molecular sieve; ammonia; water; silver perchlorate; acetic anhydride; sodium cyanoborohydride; acetic acid; dimethyl sulfoxide; 1,1,1,3,3,3-hexamethyl-disilazane; zinc(II) chloride;
toluene-4-sulfonic acid;
In
tetrahydrofuran; 1,4-dioxane; methanol; diethyl ether; ethanol; water; ethylene glycol; N,N-dimethyl-formamide; toluene;
1.1: Etherification / 2.1: Ring cleavage / 3.1: Oxidation / 4.1: Reduction / 5.1: Condensation / 6.1: Ring cleavage / 7.1: Acetylation / 8.1: Condensation / 8.2: Solvolysis / 9.1: Deacetylation;
DOI:10.1039/a909347h