Multi-step reaction with 12 steps
1.1: 93 percent / DIBAL / CH2Cl2 / 2 h / 0 °C
2.1: 99 percent / Et3N / 1 h / 0 °C
3.1: NaH (in oil)77 / dimethylformamide / 0.25 h / 0 °C
3.2: 84 percent / dimethylformamide / 18 h / 20 °C
4.1: 99 percent / aq. NaOH / ethanol
5.1: 94 percent / 0.5 h / 20 °C
6.1: 83 percent / 80 percent AcOH / H2O / 1 h / 60 °C
7.1: 96 percent / DMAP / CH2Cl2 / 3 h / 20 °C
8.1: 98 percent / DMAP / CH2Cl2 / 1 h / 20 °C
9.1: 91 percent / DDQ / CH2Cl2 / 1 h / 20 °C
10.1: 95 percent / Et3N; DMAP / tetrahydrofuran / 24 h / 20 °C
11.1: 91 percent / aq. HCl / tetrahydrofuran / 2 h / 20 °C
12.1: 80 percent / diethylaminosulfur trifluoride / 1,2-dimethoxy-ethane / 3 h / 0 °C
With
hydrogenchloride; dmap; sodium hydroxide; diethylamino-sulfur trifluoride; sodium hydride; diisobutylaluminium hydride; acetic acid; triethylamine; 2,3-dicyano-5,6-dichloro-p-benzoquinone;
In
tetrahydrofuran; 1,2-dimethoxyethane; ethanol; dichloromethane; water; N,N-dimethyl-formamide;
DOI:10.1016/S0008-6215(01)00134-3