Multi-step reaction with 7 steps
1: 1.) NaH / 1.) THF, 25 deg C, 20 min, 2.) THF, from 25 deg C to 60 deg C, 4.5 h
2: NaBH4 / methanol; tetrahydrofuran / -45 °C
3: K2CO3 / methanol / 1 h / 50 °C
4: p-toluenesulfonic acid / CH2Cl2 / 0.33 h / 25 °C
5: 1.) LDA / 1.) THF, hexane, -78 deg C, 20 min, 2.) THF, hexane, a) -78 deg C, 30 min, b) 20 deg C, 30 min
6: 85 percent / 30percent H2O2 / ethyl acetate; methanol / 0.33 h / 40 °C
7: 71 percent / 65percent aq. acetic acid / tetrahydrofuran / 0.33 h / 70 °C
With
sodium tetrahydroborate; dihydrogen peroxide; sodium hydride; potassium carbonate; toluene-4-sulfonic acid; acetic acid; lithium diisopropyl amide;
In
tetrahydrofuran; methanol; dichloromethane; ethyl acetate;
DOI:10.1021/jm00179a011