Multi-step reaction with 9 steps
1.1: 90 percent / NH4NO3 / methanol / 2 h / Heating
2.1: 88 percent / SiO2; aq. H2SO4 / CH2Cl2 / 0.75 h / 20 °C
3.1: nBuLi / hexamethylphosphoric acid triamide; tetrahydrofuran / 1.5 h / -80 °C
3.2: secBuLi / tetrahydrofuran / -80 °C
4.1: 92 percent / imidazole / dimethylformamide / 15 h / 20 °C
5.1: 92 percent / H2 / Pd/C / ethyl acetate / 0.5 h / 20 °C
6.1: 100 percent / SiO2; aq. H2SO4 / CH2Cl2 / 1.5 h / 20 °C
7.1: LiHMDS / hexamethylphosphoric acid triamide; tetrahydrofuran / 1.5 h / -80 °C
8.1: Na2CO3 / hexamethylphosphoric acid triamide; tetrahydrofuran / 12 h / 20 °C
9.1: 91 percent / nBu4NF / tetrahydrofuran / 15 h / 0 - 20 °C
With
1H-imidazole; ammonium nitrate; n-butyllithium; sulfuric acid; tetrabutyl ammonium fluoride; hydrogen; silica gel; sodium carbonate; lithium hexamethyldisilazane;
palladium on activated charcoal;
In
tetrahydrofuran; methanol; N,N,N,N,N,N-hexamethylphosphoric triamide; dichloromethane; ethyl acetate; N,N-dimethyl-formamide;
7.1: Wittig reaction;
DOI:10.1016/S0040-4039(02)01056-0