Multi-step reaction with 12 steps
1: NH4OAc, AcOH / benzene / 24 h / Heating
2: S, Et2NH / ethanol / 2 h / 60 °C
3: 1.) pyridine, 2.) NaOEt / 1.) 45 deg C, 3 h, 2.) EtOH, RT, 1.5 h
4: 85 percent / AlCl3, dimethyl disulfide / CH2Cl2 / 20 h / Ambient temperature
5: pyridine / 3 h / Ambient temperature
6: K2CO3 / dimethylformamide / 13 h / Ambient temperature
7: 78 percent / aq. K2CO3 / methanol; tetrahydrofuran / 0.67 h / Ambient temperature
8: 1.) NaH / 1.) DMF, 0 deg C, 30 min, 2.) DMF, RT, 3 h
9: 82 percent / NBS, 2,2'-azobis(isobutyronitrile) / CCl4 / 2 h / Heating
10: 75 percent / dimethylformamide / 4 h / Ambient temperature
11: 84 percent / hydrazine monohydrate / ethanol / 16 h / 80 °C
12: 90 percent / CH2Cl2
With
pyridine; N-Bromosuccinimide; aluminium trichloride; 2,2'-azobis(isobutyronitrile); Dimethyldisulphide; ammonium acetate; sodium ethanolate; sodium hydride; potassium carbonate; hydrazine hydrate; acetic acid; diethylamine;
In
tetrahydrofuran; methanol; tetrachloromethane; ethanol; dichloromethane; N,N-dimethyl-formamide; benzene;
DOI:10.1248/cpb.46.1724