Multi-step reaction with 7 steps
1: 92 percent / 1 N aq. NaOH / 15 h
2: 1.) isobutyl chloroformate, diisopropylethylamine, 2.) lithium aluminum hydride / 1.) THF, 0 deg C, 1 h, 2.) THF, Et2O, RT, 24 h
3: 46 percent / DMAP, triethylamine / CH2Cl2 / 2.25 h / Ambient temperature
4: 69 percent / sodium azide / dimethylformamide / 1.5 h / 80 °C
5: 100 percent / 4 N HCl / dioxane / 15 h / Ambient temperature
6: 68 percent / triethylamine, N-hydroxysuccinimide, ethylcarbodiimide hydrochloride / CH2Cl2 / 15 h / Ambient temperature
7: 90 percent / H2 / 10percent Pd/C / ethanol / 15 h
With
hydrogenchloride; dmap; sodium hydroxide; 1-hydroxy-pyrrolidine-2,5-dione; lithium aluminium tetrahydride; sodium azide; 3-ethylcarbodiimide hydrochloride; hydrogen; triethylamine; N-ethyl-N,N-diisopropylamine; isobutyl chloroformate;
palladium on activated charcoal;
In
1,4-dioxane; ethanol; dichloromethane; N,N-dimethyl-formamide;
DOI:10.1021/jm00017a022