Multi-step reaction with 9 steps
1: 1.) conc. hydrochloric acid / 1.) methanol, RT, 24 h, 2.) toluene, 80 deg C, 3.25 h
2: 76 percent / imidazole / dimethylformamide / 16.5 h / 65 °C
3: 98 percent / 0.1 M sodium hydroxide / tetrahydrofuran / 0.5 h / Ambient temperature
4: 1.) N-hydroxysuccinimide, N,N-dicyclohexylcarbodiimide, 2.) sodium borohydride / 1.) THF, RT, 17 h, 2.) DMF, RT, 55 min
5: 95 percent / 2,4,6-collidine / CH2Cl2 / 0.75 h
6: 91 percent / sodium azide / dimethylformamide / 4 h / 20 °C
7: 91 percent / tetrabutylammonium fluoride / tetrahydrofuran / 1.17 h / Ambient temperature
8: 66 percent / triphenylphosphine / tetrahydrofuran; H2O / 23 h / 44 °C
9: 38 percent / 6,5 M hydrogen chloride / dioxane / 4 h / Ambient temperature
With
1H-imidazole; 2,4,6-trimethyl-pyridine; hydrogenchloride; sodium hydroxide; sodium tetrahydroborate; 1-hydroxy-pyrrolidine-2,5-dione; sodium azide; tetrabutyl ammonium fluoride; dicyclohexyl-carbodiimide; triphenylphosphine;
In
tetrahydrofuran; 1,4-dioxane; dichloromethane; water; N,N-dimethyl-formamide;
DOI:10.1021/jm950893j