Multi-step reaction with 8 steps
1: pyridine, H2 / Pd/BaSO4 / 20 h / 760 Torr
2: 1.) NaH / 1.) THF, RT, 45 min, 2.) THF, RT, 90 min
3: 81 percent / Et3N, 4-(dimethylamino)pyridine / dimethylformamide / 48 h / Ambient temperature
4: 1.) O3, MeOH, 2.) Me2S / 1.) CH2Cl2, -78 deg C, 2.) CH2Cl2, RT, 3 h
5: 34.2 percent / Zn, 1,2-dibromoethane, chlorotrimethylsilane / tetrahydrofuran / 3 h / Ambient temperature
6: 95 percent / AcOH / H2O / 48 h / 65 °C
7: 97 percent / NaBH4 / methanol / 0.5 h / 22 °C
8: 1.) pyridine, 4 Angstroem molecular sieves / 1.) 22 deg C, 30 min, 2.) 1 h
With
pyridine; methanol; dmap; sodium tetrahydroborate; chloro-trimethyl-silane; dimethylsulfide; 4 A molecular sieve; hydrogen; sodium hydride; ozone; acetic acid; ethylene dibromide; triethylamine; zinc;
Pd-BaSO4;
In
tetrahydrofuran; methanol; water; N,N-dimethyl-formamide;
DOI:10.1021/ja00048a017