Multi-step reaction with 11 steps
1: 6N H2SO4 / 3 h / 20 °C
2: 75 percent / methyl acetate / 15 h / 50 °C
3: N,N-diisopropylethylamine / CHCl3 / 72 h / 28 °C
4: TsOH / dimethylformamide / 2 h / 20 °C
5: 79 percent / butyllithium / hexane; tetrahydrofuran / 1.) -78 deg C, 2.5 h, 2.) 0 deg C, 1 h
6: 78 percent / BF3 / diethyl ether / 15 h / 20 °C
7: diisobutylaluminium hydride / toluene / 0.5 h / -78 °C
8: 72 percent / Amberlyst 15 / 3 h / 20 °C
9: NaH / dimethylformamide / 2 h / 20 °C
10: CdCO3, HgCl2 / acetone; H2O / 2 h / 20 °C
11: 91 percent / toluene / 48 h / 105 °C
With
n-butyllithium; Amberlyst 15; cadmium(II) carbonate; sulfuric acid; boron trifluoride; sodium hydride; diisobutylaluminium hydride; N-ethyl-N,N-diisopropylamine; mercury dichloride;
toluene-4-sulfonic acid;
In
tetrahydrofuran; diethyl ether; hexane; chloroform; acetic acid methyl ester; water; N,N-dimethyl-formamide; acetone; toluene;
DOI:10.1016/S0040-4039(00)78621-7