Multi-step reaction with 12 steps
1.1: p-TsOH / 12 h / 0 °C
2.1: magnesium / tetrahydrofuran
2.2: 348 mg / tetrahydrofuran / 13.5 h / -78 - 20 °C
3.1: pyridine; 4-(dimethylamino)pyridine / CH2Cl2 / 20 °C
4.1: 535 mg / AcOH / H2O / 11 h / 20 °C
5.1: imidazole / CH2Cl2 / 2 h / 20 °C
6.1: trifluoromethanesulfonic acid / cyclohexane; CH2Cl2 / 3.5 h / 0 - 20 °C
7.1: 324 mg / TBAF / tetrahydrofuran / 3 h / 20 °C
8.1: IBX / dimethylsulfoxide; CH2Cl2 / 12 h / 20 °C
9.1: CH2Cl2 / 1 h / 20 °C
10.1: 83.1 mg / triethylamine / acetonitrile / 2 h / Heating
11.1: potassium carbonate / methanol; CH2Cl2 / 6 h / 20 °C
12.1: 100 percent / IBX / CH2Cl2; dimethylsulfoxide / 36 h / 20 °C
With
pyridine; 1H-imidazole; dmap; trifluorormethanesulfonic acid; tetrabutyl ammonium fluoride; potassium carbonate; toluene-4-sulfonic acid; magnesium; acetic acid; triethylamine; 1-hydroxy-3H-benz[d][1,2]iodoxole-1,3-dione;
In
tetrahydrofuran; methanol; dichloromethane; cyclohexane; water; dimethyl sulfoxide; acetonitrile;
DOI:10.1021/ol062621o