Multi-step reaction with 9 steps
1: 32 percent / 50percent aq. NaOH / 72 h / Ambient temperature
2: EtONa / ethanol / 6 h / Heating
3: 2 N NaOH / 2 h / Heating
4: 5 N H2SO4 / 4.5 h / Heating
5: 90 percent / p-toluenesulfonic acid / benzene / Heating
6: 1.) LDA / 1.) THF, hexane, RT, 1 h, 2.) THF, hexane, a) -65 deg C, 1 h, b) RT, 16 h
7: 79 percent / 10percent aq. HCl / ethanol / Heating
8: 33 percent / concd HCl, glacial AcOH / 4 h / 85 °C
9: 22 percent / ethanol / 1.5 h / Heating
With
hydrogenchloride; sodium hydroxide; sulfuric acid; sodium ethanolate; toluene-4-sulfonic acid; acetic acid; lithium diisopropyl amide;
In
ethanol; benzene;
DOI:10.1021/jm00097a001