Multi-step reaction with 6 steps
1: 1.) Br2, 2.) concd. HCl / 1.) AcOH, 50-55 deg C, 30 min, 2.) EtOH, reflux, 3 h
2: 1.) aq. HCl, NaNO2, 2.) CuCl / 1.) 0-5 deg C, 2.) H2O, toluene, a) RT, 2 h, b) 50 deg C
3: 1.) DIBAL, 2.) MeOH / 1.) a) toluene, CH2Cl2, -60 to -50 deg C, 30 min, b) toluene, CH2Cl2, RT, 2 h, 2.) 0-10 deg C, 30 min
4: 80 percent / p-TsOH / ethanol / 1 h / Heating
6: 94 percent / CHCl3 / 18 h / Ambient temperature
With
hydrogenchloride; methanol; bromine; diisobutylaluminium hydride; toluene-4-sulfonic acid; copper(l) chloride; sodium nitrite;
In
ethanol; chloroform;
DOI:10.1021/jm00142a006