Multi-step reaction with 9 steps
1: 100 percent / HCl / methanol / 16 h / 22 °C
2: 95 percent / TsOH / acetonitrile / 4 h
3: 96 percent / DMAP / pyridine / 1 h / 22 °C
4: 93 percent / NaBH3CN, HCl, 3 Angstroems MS / diethyl ether; tetrahydrofuran / 2 h / 0 °C
5: pyridine / CH2Cl2 / 2 h / -50 - -20 °C
6: 864 mg / dimethylformamide / 2.5 h / Ambient temperature
7: 1.) AgOTf, 2.) MeSBr / 1.) CH2Cl2, -70 deg C, 5 min, 2.) CH2Cl2, 1,2-dichloroethane, -78 deg C, 2 h
8: 1,2-diaminoethane / ethanol / 16 h / 60 °C
9: 263 mg / methanol; H2O / 1.5 h / 22 °C
With
pyridine; hydrogenchloride; dmap; methanesulfonyl bromide; 3 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