Multi-step reaction with 9 steps
1: 96 percent / TsOH / acetonitrile / 17 h
3: 98 percent / DMAP / pyridine / 0.67 h / 22 °C
4: 80 percent / NaBH3CN, 4 Angstroems MS, HCl / tetrahydrofuran; diethyl ether / 1.5 h / 0 °C
5: pyridine / CH2Cl2 / 3 h / 22 °C
6: 1.76 g / NaN3 / dimethylformamide / 15 h / 22 °C
7: 1.) AgOTf, 2.) MeSBr / 1.) CH2Cl2, -78 deg C, 5 min, 2.) CH2Cl2, 1,2-dichloroethane, -78 deg C, 1.5 h
8: 1,2-diaminoethane / ethanol / 15 h / 60 °C
9: 161 mg / methanol; H2O / 1 h / 22 °C
With
pyridine; hydrogenchloride; dmap; sodium azide; methanesulfonyl bromide; 4 Angstroems MS; silver trifluoromethanesulfonate; sodium cyanoborohydride; toluene-4-sulfonic acid; ethylenediamine;
In
tetrahydrofuran; pyridine; methanol; diethyl ether; ethanol; dichloromethane; water; N,N-dimethyl-formamide; acetonitrile;
DOI:10.1021/jo981204p