Multi-step reaction with 7 steps
1: 1.) NaH / 1.) THF, DMF, RT, 1.5 h, 2.) RT, 12 h
2: 81 percent / H2 / 5percent Pd/C / ethyl acetate; acetic acid / 4 h / 760 Torr
3: 59 percent / KH / tetrahydrofuran / 1.) RT, 3 h, 2.) reflux, 19 h
4: 1.) H2O, AcOH, 2.) pyridine / 1.) THF, 80 deg C, 15 h, 2.) CH2Cl2, RT, 12 h
5: 99 percent / benzene; methanol; acetic acid / 6 h / Irradiation
6: 74 percent / concd. H2SO4 / methanol / 1.) reflux, 6 h, 2.) RT, 12 h
7: 51 percent / KH, ethanethiol / dimethylformamide / 6 h / 80 °C
With
pyridine; sulfuric acid; water; hydrogen; potassium hydride; sodium hydride; acetic acid; ethanethiol;
palladium on activated charcoal;
In
tetrahydrofuran; methanol; acetic acid; ethyl acetate; N,N-dimethyl-formamide; benzene;
DOI:10.1021/jo00202a014