Multi-step reaction with 14 steps
1: H2 / Raney nickel / methanol
2: 87 percent / sodium bicarbonate / tetrahydrofuran; H2O
3: 92 percent / 4-(dimethylamino)pyridine (DMAP), 3-ethyl-1-<3-(dimethylamino)propyl>carbodiimide (EDC) / CH2Cl2 / 0 °C
4: H2 / 10 percent Pd/C / methanol / 760 Torr
5: pyridinium dichromate (PDC) / dimethylformamide / 48 h
6: 45 percent / potassium carbonate / acetone / 6 h / Heating
7: trifluoroacetic acid (TFA) / CH2Cl2 / Ambient temperature
8: hydroxybenzotriazole monohydrate (HOBt), 3-ethyl-1-<3-(dimethylamino)propyl>carbodiimide (EDC), N-methylmorpholine (NMM) / CH2Cl2 / 0 - 20 °C
9: H2 / 10 percent Pd/C / methanol / 760 Torr
10: 4-(dimethylamino)pyridine (DMAP), 4-(dimethylamino)pyridine hydrochloride, 3-ethyl-1-<3-(dimethylamino)propyl>carbodiimide (EDC) / tetrahydrofuran; CHCl3 / 19 h / Heating
11: trifluoroacetic acid (TFA) / CH2Cl2 / Ambient temperature
12: hydroxybenzotriazole monohydrate (HOBt), 3-ethyl-1-<3-(dimethylamino)propyl>carbodiimide (EDC) / CH2Cl2 / 0 - 20 °C
13: acetic acid, Zn / 5 h
14: acetic acid, pyridine, sodium cyanoborohydride / H2O
With
4-methyl-morpholine; pyridine; dmap; dipyridinium dichromate; hydrogen; 4-(dimethylamino)pyridine hydrochloride; sodium cyanoborohydride; sodium hydrogencarbonate; potassium carbonate; benzotriazol-1-ol; acetic acid; N-(3-dimethylaminopropyl)-N-ethylcarbodiimide; trifluoroacetic acid; zinc;
palladium on activated charcoal; nickel;
In
tetrahydrofuran; methanol; dichloromethane; chloroform; water; N,N-dimethyl-formamide; acetone;
DOI:10.1021/jm00099a004