Multi-step reaction with 13 steps
1: 94 percent / H2SO4 / Heating
2: 96 percent / K2CO3 / 4 h / 55 °C
3: 90 percent / LDA / tetrahydrofuran / 0.5 h / -78 °C
4: 63 percent / DIBALH / CH2Cl2 / 0 °C / to room temperature
5: 3A molecular sieves / PPL / 24 h / 0 °C
6: p-TSA / CH2Cl2 / Ambient temperature
7: KOH / methanol / Ambient temperature
8: 98 percent / NaH / dimethylformamide / Ambient temperature
9: 93 percent / p-TSA / methanol / Ambient temperature
10: 90 percent / Jones reagent / acetone / 0 °C
11: 1.) CDI / 1.) THF, room temperature, 2.) -78 deg C
12: 81 percent / Bu3SnH, AcOH / Pd(PPh3)4 / toluene / Ambient temperature
13: 80 percent / trimethylsilyl triflate, 4A molecular sieves / CH2Cl2; tetrahydrofuran / Ambient temperature
With
potassium hydroxide; jones reagent; trimethylsilyl trifluoromethanesulfonate; 3 A molecular sieve; 4 A molecular sieve; sulfuric acid; tri-n-butyl-tin hydride; sodium hydride; diisobutylaluminium hydride; potassium carbonate; toluene-4-sulfonic acid; acetic acid; 1,1'-carbonyldiimidazole; lithium diisopropyl amide;
tetrakis(triphenylphosphine) palladium(0);
In
tetrahydrofuran; methanol; dichloromethane; N,N-dimethyl-formamide; acetone; toluene;
DOI:10.1016/S0040-4039(00)61382-5