Multi-step reaction with 12 steps
1: 94 percent / potassium carbonate, tetrabutylammonium iodide / dimethylformamide / 10 h / Ambient temperature
2: 1) potassium tert-butoxide / 1) dioxane, 0 deg C , then 0.8 h, RT 2) dioxane, 2 h , RT, then reflux 2h
3: 75 percent / p-toluenesulfonic acid / H2O; dioxane / 16 h / Heating
4: 1) n-butyllithium / 1) THF, -78 deg C 2) THF, 0 deg C, 2 h
5: imidazole / dimethylformamide / 29 h / Ambient temperature
6: 85 percent / acetic anhydride / heptane / 3 h / 80 °C
7: 80 percent / potassium carbonate, tetra-n-butylammonium iodide / dimethylformamide / 48 h / Ambient temperature
8: 68 percent / tetra-n-butylammonium fluoride / tetrahydrofuran / 72 h / Ambient temperature
9: 1) oxalyl chloride, dimethylsulfoxide 2) Et3N / 1) methylene chloride, -67 deg C
10: sodium methoxide / methanol / 3 h / 65 °C
11: pyridinium chlorochromate / CH2Cl2 / 14 h / Ambient temperature
12: 65 percent / ammonium formate / 10 percent Pd/C / methanol / 0.17 h / 65 °C
With
1H-imidazole; n-butyllithium; oxalyl dichloride; potassium tert-butylate; tetrabutyl ammonium fluoride; sodium methylate; ammonium formate; acetic anhydride; tetra-(n-butyl)ammonium iodide; potassium carbonate; toluene-4-sulfonic acid; dimethyl sulfoxide; triethylamine; pyridinium chlorochromate;
palladium on activated charcoal;
In
tetrahydrofuran; 1,4-dioxane; methanol; n-heptane; dichloromethane; water; N,N-dimethyl-formamide;
DOI:10.1021/jo00293a043