Multi-step reaction with 10 steps
1: 84 percent / NaH / dimethylformamide / 1.) 0 deg C, 30 min, 2.) o deg C to room temperature
2: 86 percent / TBAF / tetrahydrofuran / 9 h / Ambient temperature
3: 84 percent / NaH / tetrahydrofuran / 1.) 50 deg C, 1 h, 2.) 65 deg C, 19 h
4: 80 percent / p-TsOH / methanol; ethyl acetate / 48 h
5: 1.) Bu2SnO, 2.) Bu4NI / 1.) MeOH, reflux, 2.3 h, 2.) tluene, 65 deg C, 15 h
6: 73 percent / pyridine / CH2Cl2 / Ambient temperature
7: 82 percent / NIS, triflic acid / CH2Cl2 / 0.5 h
8: 81 percent / p-toluenesulfonic acid / methanol; ethyl acetate / 7 h
9: 61 percent / NaH, Cs2CO3 / tetrahydrofuran / 24 h / Heating
10: 1.) t-BuOK, 2.) HgO, HgCl2 / 1.) DMSO, 80 deg C, 2 h, 2.) acetone, H2O, 30 min
With
pyridine; N-iodo-succinimide; trifluorormethanesulfonic acid; potassium tert-butylate; tetrabutyl ammonium fluoride; tetra-(n-butyl)ammonium iodide; sodium hydride; di(n-butyl)tin oxide; caesium carbonate; toluene-4-sulfonic acid; mercury dichloride; mercury(II) oxide;
In
tetrahydrofuran; methanol; dichloromethane; ethyl acetate; N,N-dimethyl-formamide;
DOI:10.1021/jo9806097