Multi-step reaction with 8 steps
1: dimethylsulfoxide; dioxane / a) 140 deg C, 4 h, b) 150 deg 30 min
2: 96 percent / SOCl2 / dimethylformamide / 5.5 h / 90 - 140 °C
3: 1.) NaOEt / 1.) toluene, Rt, 1 h, 2.) toluene, 1h
4: p-TsOH*H2O / H2O / 3 h / Heating
5: 1.) Ac2O / 1.) from 130 to 140 deg C, 2 h, 2.) EtOH, RT, overnight
6: 90 percent / Et3N / paraffin / 180 - 190 °C
7: 91 percent / trichloroethene / 5.5 h / Heating
8: 90 percent / conc. HNO3 / acetic acid / 0.75 h
With
thionyl chloride; nitric acid; sodium ethanolate; acetic anhydride; toluene-4-sulfonic acid; triethylamine;
In
1,4-dioxane; Trichloroethylene; water; acetic acid; dimethyl sulfoxide; N,N-dimethyl-formamide; paraffin;
DOI:10.1248/cpb.43.2123