Multi-step reaction with 9 steps
1: SO3-pyridine, Et3N / dimethylformamide / 1 h / Ambient temperature
2: tetrahydrofuran / 2 h / -78 - 0 °C
3: p-toluenesulfonic acid / CH2Cl2 / Ambient temperature
4: 1.) OsO4, aq. NaIO4, 2.) K2CO3 / 1.) dioxane, water, RT, 2 h, 2.) MeOH, RT, 2 h
5: 1.) LiCl, 1,8-diazabicyclo<5.4.0>-7-undecene / 1.) THF, benzene, RT, 10 min, 2.) THF, benzene, RT, overnight
6: KOH / ethanol; H2O / Ambient temperature
7: 30.8 percent / diphenylphosphorazidate (DPPA), Et3N / dimethylformamide / 1.) -10 deg C, 2 h, 2.) RT, overnight
8: H2 / Pd-black / ethanol
9: diphenylphosphorazidate (DPPA), Et3N / dimethylformamide / 1.) -10 deg C, 2 h, 2.) RT, overnight
With
potassium hydroxide; sodium periodate; osmium(VIII) oxide; pyridine-SO3 complex; diphenyl phosphoryl azide; hydrogen; potassium carbonate; toluene-4-sulfonic acid; 1,8-diazabicyclo[5.4.0]undec-7-ene; triethylamine; lithium chloride;
palladium;
In
tetrahydrofuran; ethanol; dichloromethane; water; N,N-dimethyl-formamide;
DOI:10.1248/cpb.40.364