Multi-step reaction with 8 steps
1: 82 percent / hexamethylphosphoramide, methyllithium, p-toluenesulfonyl chloride, LiCl / diethyl ether / 19 h / Ambient temperature
2: 91 percent / NaBr / dimethylformamide / 5 h / Ambient temperature
3: 1.) NaH, 2.) n-butyllithium
4: 94 percent / triethylamine / tetrahydrofuran / 6 h / Heating
5: 71 percent / p-toluenesulfonic acid / benzene / 27 h / Heating
6: triethyl orthoformate, p-toluenesulfonic acid / diethyl ether / 37 h / Ambient temperature
7: LiAlH4 / tetrahydrofuran / 22 h / Ambient temperature
8: 315 mg / acetic acid, water / 4.5 h / Ambient temperature
With
N,N,N,N,N,N-hexamethylphosphoric triamide; lithium aluminium tetrahydride; n-butyllithium; water; methyllithium; sodium hydride; toluene-4-sulfonic acid; acetic acid; triethylamine; orthoformic acid triethyl ester; p-toluenesulfonyl chloride; sodium bromide; lithium chloride;
In
tetrahydrofuran; diethyl ether; N,N-dimethyl-formamide; benzene;
DOI:10.1021/jo00225a049