Multi-step reaction with 8 steps
1.1: DIBAL-H / toluene / -40 - 0 °C
2.1: 117 g / aq. H2SO4 / 20 °C
3.1: LDA / hexane; tetrahydrofuran / 0.5 h / -78 °C
3.2: ClPO(OEt)2 / hexane; tetrahydrofuran / 0.5 h / 0 °C
3.3: 92 percent / hexane; tetrahydrofuran / 0.5 h / 0 °C
4.1: n-BuLi; TMEDA / hexane; tetrahydrofuran / 0.5 h / -78 °C
4.2: 76 percent Chromat. / hexane; tetrahydrofuran / -78 °C
5.1: 11.2 g / aq. H2SO4 / dioxane / 1.5 h / 110 °C
6.1: 91 percent / EDCI; DMAP / tetrahydrofuran / 5 h / 20 °C
7.1: 97 percent / NaHCO3; Pd(OAc)2; 1,1'-bis(diphenylphosphino)ferrocene / 18 h / 70 °C / 760 Torr
8.1: n-BuLi / hexane; tetrahydrofuran / 0.5 h / -78 °C
8.2: 88 percent / hexane; tetrahydrofuran / 0.17 h / -78 °C
With
dmap; 1,1'-bis-(diphenylphosphino)ferrocene; palladium diacetate; n-butyllithium; N,N,N,N,-tetramethylethylenediamine; sulfuric acid; diisobutylaluminium hydride; sodium hydrogencarbonate; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; lithium diisopropyl amide;
In
tetrahydrofuran; 1,4-dioxane; hexane; toluene;
DOI:10.1248/cpb.50.1066