Multi-step reaction with 7 steps
1: 82 percent / CrO3, pyridine, Ac2O / CH2Cl2 / 4 h / Ambient temperature
2: 16 percent / diethyl ether / 16 h / Ambient temperature
3: 2.) TMS triflate / 1.) MeCN, r.t., 1 h, 2.) r.t., 7 d
4: 1.) BH3*1,4-oxathiane, 1,4-oxathiane, 2.) 30percent aq. H2O2, 2 M aq. NaOH / 1.) THF, r.t., 2.) r.t., 60 min
5: 86 percent / PPh3, DEAD / tetrahydrofuran / 24 h / Ambient temperature
6: 33 percent / TBAF / tetrahydrofuran / 0.33 h
7: 43 percent / AgNO3, pyridine / tetrahydrofuran / 72 h / Ambient temperature
With
1,4-Oxathiane; pyridine; chromium(VI) oxide; sodium hydroxide; trimethylsilyl trifluoromethanesulfonate; borane:1,4-oxathiane; tetrabutyl ammonium fluoride; dihydrogen peroxide; acetic anhydride; silver nitrate; triphenylphosphine; diethylazodicarboxylate;
In
tetrahydrofuran; diethyl ether; dichloromethane;
DOI:10.1039/a703173d