Multi-step reaction with 6 steps
1: 45 percent / dioxane / 20 h / Heating
2: 1.) HMPA, CuBr*Me2S, Me3SiCl, 2.) potassium fluoride / 1.) Et2O, THF, -78 deg C, 1 h, 2.) MeOH, RT, 5 min
3: 92 percent / LiAlH4 / tetrahydrofuran; diethyl ether / 1 h / Ambient temperature
4: 1.) LDA / 1.) THF, hexane, -78 deg C, 5 min, 2.) THF, hexane, -78 deg C, 1 h
5: 50 percent / Bu3SnH, AIBN / toluene / 1 h / 90 °C
6: 61 percent / PCl3 / dimethylformamide / 1 h / 0 °C
With
N,N,N,N,N,N-hexamethylphosphoric triamide; potassium fluoride; lithium aluminium tetrahydride; chloro-trimethyl-silane; copper(I) bromide dimethylsulfide complex; 2,2'-azobis(isobutyronitrile); tri-n-butyl-tin hydride; lithium diisopropyl amide; phosphorus trichloride;
In
tetrahydrofuran; 1,4-dioxane; diethyl ether; N,N-dimethyl-formamide; toluene;
DOI:10.1021/jm9802564