Multi-step reaction with 6 steps
1.1: sodium hydride; hexamethylphosphoramide / dioxane / 1 h / 20 °C
1.2: 75 percent / CuBr / dioxane / 3 h / Heating
2.1: 87 percent / Et3N; Pd(OAc)2; (o-tolyl)3P / 16 h / Heating
3.1: PhSCu / diethyl ether; tetrahydrofuran / 0.33 h / -40 °C
3.2: 58 percent / tetrahydrofuran; diethyl ether / 3 h / -40 °C
4.1: N-sodiohexamethyldisilazane / tetrahydrofuran / 1 h / -78 °C
4.2: 53 percent / tetrahydrofuran / 4 h / -78 °C
5.1: 73 percent / LiOH; aq. H2O2 / tetrahydrofuran / 2.5 h / 0 °C
6.1: 70 percent / 1-hydroxy-7-azabenzotriazole; 1-ethyl-3-(3'-dimethylamino)propyl)carbodiimide*HCl / dimethylformamide / 25.5 h / 20 - 50 °C
With
N,N,N,N,N,N-hexamethylphosphoric triamide; palladium diacetate; lithium hydroxide; 1-hydroxy-7-aza-benzotriazole; dihydrogen peroxide; sodium hexamethyldisilazane; copper(I) thiophenolate; sodium hydride; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; triethylamine; tris-(o-tolyl)phosphine;
In
tetrahydrofuran; 1,4-dioxane; diethyl ether; N,N-dimethyl-formamide;
DOI:10.1021/jm030510e