Multi-step reaction with 9 steps
1: 97 percent / imidazole / dimethylformamide / Ambient temperature
2: NaIO4 / methanol; H2O / 36 h
3: 88 percent / P(OMe)3 / methanol / 48 h
4: 45 percent / Ti(Oi-Pr)4, t-BuOOH, D-(-)-DET / CH2Cl2; toluene / 36 h / -23 °C
5: 83 percent / NaIO4 / CH2Cl2; H2O / 8 h / 32 °C
6: 1.) KHMDS / 1.) THF, DMSO, 0 deg C, 1 h, 2.) THF, DMSO, a) -78 deg C, 30 min, b) 40 deg C, 8 h
7: 99 percent / TBAF*3H2O / tetrahydrofuran / Ambient temperature
8: 91 percent / LiAlH4 / tetrahydrofuran / 2 h / Heating
9: 98 percent / H2 / 10percent Pd/C / ethanol / 760 Torr
With
1H-imidazole; titanium(IV) isopropylate; tert.-butylhydroperoxide; sodium periodate; lithium aluminium tetrahydride; diethyl (2S,3S)-tartrate; tetrabutyl ammonium fluoride; hydrogen; potassium hexamethylsilazane; phosphorous acid trimethyl ester;
palladium on activated charcoal;
In
tetrahydrofuran; methanol; ethanol; dichloromethane; water; N,N-dimethyl-formamide; toluene;
DOI:10.1055/s-1997-1347