Multi-step reaction with 7 steps
1: 99 percent / imidazole / dimethylformamide / 24 h / Ambient temperature
2: 1.) Mg, 1,2-dibromoethane / 1.) THF, reflux, 5 h, 2.) THF, -78 deg C, 1 h; room temperature, 16 h
3: 70 percent / NaOMe / methanol / 24 h / 70 °C
4: 87 percent / AcOH, H2O / tetrahydrofuran / 24 h / 45 °C
5: 89 percent / MnO2 / CH2Cl2 / 16 h / Heating
6: 1.) AcOH, 2.) NaBH3CN / 1.) MeOH, room temperature, 2 h, 2.) 16 h
7: 95 percent / pyridine / CH2Cl2 / 16 h
With
pyridine; 1H-imidazole; manganese(IV) oxide; water; sodium methylate; sodium cyanoborohydride; magnesium; acetic acid; ethylene dibromide;
In
tetrahydrofuran; methanol; dichloromethane; N,N-dimethyl-formamide;
DOI:10.1021/jo9620472