Multi-step reaction with 7 steps
1: 86 percent / conc. H2SO4 / CH2Cl2 / 8 h / Ambient temperature
2: 86 percent / Et3N, 4-(N,N-dimethylamino)pyridine / dimethylformamide / 4 h / Ambient temperature
3: 1.) Mg, I2, 2.) ZnCl2, 3.) NiCl2*1,2-bis(diphenylphosphino)ethane
4: 99 percent / 1.1 M tetrabutylammonium fluoride / tetrahydrofuran / 1.5 h / Ambient temperature
5: 79 percent / 2 N NaOH / methanol / 8 h / Heating
6: 1.) NaH / 1.) DMF, RT, 1 h, 2.) DMF, 20 deg C, 2 h
7: 89 percent / pyridine, 4-(N,N-dimethylamino)pyridine / CH2Cl2 / -70 °C
With
pyridine; dmap; sodium hydroxide; 1,2-bis(diphenylphosphino)ethane nickel(II) chloride; sulfuric acid; tetrabutyl ammonium fluoride; iodine; sodium hydride; magnesium; triethylamine; zinc(II) chloride;
In
tetrahydrofuran; methanol; dichloromethane; N,N-dimethyl-formamide;
DOI:10.1021/jm00026a006