Multi-step reaction with 9 steps
1.1: 29.0 g / POCl3 / 3 h / Heating
2.1: BBr3 / CH2Cl2 / 3 h / -12 - 0 °C
2.2: 99 percent / H2O / diethyl ether; CH2Cl2 / 2 h / 20 °C
3.1: 100 percent / imidazole; DMAP / CH2Cl2 / 24 h / 20 °C
4.1: Pd(PPh3)2Cl2 / dimethylformamide / 18 h / 80 °C
4.2: aq. KF / diethyl ether; dimethylformamide / 0.75 h / 20 °C
5.1: 14.94 g / aq. HCl / acetone / 20 °C
6.1: KOBu-t / tetrahydrofuran / 0.17 h
6.2: tetrahydrofuran / 18.08 h / 0 - 20 °C
6.3: 61 percent / ammonium acetate / acetic acid; tetrahydrofuran / 1.67 h / 80 °C
7.1: NaH / tetrahydrofuran / 0.08 h / 20 °C
7.2: tetrahydrofuran / 16 h / 50 °C
7.3: 61 percent / ammonium acetate / tetrahydrofuran; acetic acid / 1 h / 80 °C
8.1: 100 percent / Bu4NF / tetrahydrofuran / 1.5 h / 20 °C
9.1: 92 percent / DMSO; (COCl)2; Et3N / CH2Cl2 / 1 h / -78 - -45 °C
With
1H-imidazole; hydrogenchloride; dmap; oxalyl dichloride; potassium tert-butylate; tetrabutyl ammonium fluoride; boron tribromide; sodium hydride; dimethyl sulfoxide; triethylamine; trichlorophosphate;
bis-triphenylphosphine-palladium(II) chloride;
In
tetrahydrofuran; dichloromethane; N,N-dimethyl-formamide; acetone;
4.1: Stille coupling / 9.1: Swern oxidation;
DOI:10.1002/1521-3765(20001117)6:22<4124::AID-CHEM4124>3.0.CO;2-M