Multi-step reaction with 10 steps
1: 1.) magnesium ethoxide / 1.) EtOH, reflux, 90 min, 2.) EtOH, reflux, 16 h
2: 100 percent / NaBH4 / ethanol / 2 h / 5 - 10 °C
3: 1.) P2O5, 2.) KOH, 3.) Ac2O
4: 41 percent / 2 h / Heating
5: 69 percent / 1,1'-carbonyldiimidazole / acetonitrile / 0 - 20 °C
6: 25 percent / 456 h / Ambient temperature
7: 33 percent / 35percent aq. NH3 / methanol / 3 h / Ambient temperature
8: 65 percent / N-methylmorpholine / CHCl3 / 72 h / Ambient temperature
9: 77 percent / formic acid / palladium black / methanol / 1.5 h
10: 37 percent / N-ethyl-N'-<(dimethylamino)propyl>carbodiimide hydrochloride, 1-hydroxybenzotriazole, diisopropylethylamine / CH2Cl2 / 18 h / Ambient temperature
With
4-methyl-morpholine; potassium hydroxide; ammonium hydroxide; sodium tetrahydroborate; formic acid; N-[3-(diethylamino)propyl]-N'-ethylcarbodiimide hydrochloride; phosphorus pentoxide; magnesium ethylate; acetic anhydride; benzotriazol-1-ol; N-ethyl-N,N-diisopropylamine; 1,1'-carbonyldiimidazole;
palladium;
In
methanol; ethanol; dichloromethane; chloroform; acetonitrile;
DOI:10.1021/jm00077a006