Multi-step reaction with 14 steps
1: 95 percent / n-Bu3SnH, AlBN / benzene / 80 °C
2: aq. 0.8percent H2SO4 / methanol / Ambient temperature
3: tetrahydrofuran / Ambient temperature
4: Dowex-50 acidic resin / H2O; benzene / 50 °C
5: NaBH4 / methanol; H2O / 0 °C
6: 74 percent / imidazole / tetrahydrofuran / -20 °C
7: 92 percent / p-TsOH / acetone / Ambient temperature
8: 100 percent / K2CO3 / methanol / Ambient temperature
9: 77 percent / Et3N / acetonitrile / -10 °C
10: 1) MsCl, Et3N, 2) n-Bu4NOH / 1) Et2O, 0 deg C, 2) Et2O, MeOH (trace), rt
11: 91 percent / aq. 0.5 N NaOH / tetrahydrofuran / 0 deg C -> rt
12: 87 percent / NaIO4 / methanol; H2O / 0 °C
13: 1) n-BuLi / 1) THF, HMPA, -30 deg C, 1 h, 2) -30 deg C -> -20 deg C
14: 86 percent / Raney nickel / acetone / Ambient temperature
With
1H-imidazole; sodium hydroxide; sodium tetrahydroborate; sodium periodate; n-butyllithium; 2,2'-azobis(isobutyronitrile); Dowex-50 acidic resin; sulfuric acid; tetra(n-butyl)ammonium hydroxide; tri-n-butyl-tin hydride; nickel; potassium carbonate; methanesulfonyl chloride; triethylamine;
toluene-4-sulfonic acid;
In
tetrahydrofuran; methanol; water; acetone; acetonitrile; benzene;
DOI:10.1021/jo00189a046