Multi-step reaction with 8 steps
1: tetrahydrofuran; diethyl ether / 2 h / Ambient temperature
2: Bu4NF / tetrahydrofuran / 0.33 h / Ambient temperature
3: 1.) NaH / 1.) DMF, 50 deg C, 1 h, 2.) DMF, RT, 20 h
4: 80percent aq. AcOH / 8 h / 90 °C
5: pyridine / 48 h / Ambient temperature
6: 1.) N,O-bis(trimethylsilyl)acetamide, 2.) trimethylsilyl triflate / 1.) acetonitrile, reflux, 30 min, 2.) acetonitrile, RT, 24 h
7: 97 percent / NaOMe, MeOH / 42 h / Ambient temperature
8: 84 percent / pyridine / 0.5 h / Ambient temperature
With
pyridine; methanol; N,O-bis-(trimethylsilyl)-acetamide; trimethylsilyl trifluoromethanesulfonate; tetrabutyl ammonium fluoride; sodium methylate; sodium hydride; acetic acid;
In
tetrahydrofuran; diethyl ether;