Multi-step reaction with 18 steps
1: 88.4 percent / aq. 16percent titanium trichloride, AcONH4, MeONa / H2O; methanol / 0.33 h / Ambient temperature
2: 85.5 percent / Jones reagent / acetone / 0.5 h / 5 °C
3: 470 mg / K2CO3 / acetone / Heating
4: p-toluenesulfonic acid, Zeolite A-3 / benzene / 1 h / Heating
5: 63.9 percent / AcONa, hydrogen / 10percent Pd-C / ethyl acetate / 6 h / 73550.8 Torr / Ambient temperature
6: 84.1 percent / NaBH4 / methanol / 1 h / -11 - -9 °C
7: 84.3 percent / diethyl azodicarboxylate, triphenylphosphine / tetrahydrofuran / 15 h / Ambient temperature
8: 1.73 g / LiAlH4 / diethyl ether / 0.33 h / 0 °C
9: 1.94 g / pyridine / 1 h / Ambient temperature
10: p-TsOH / acetone / 2.5 h / Ambient temperature
11: 1.) n-butyl lithium; 2.) Ac2O; 60percent HClO4 / 1.) hexan, THF, rt., 1 h then 0 deg C, 2 h; 2.) pyridine rt., 2 h; Et2O, rt., 10 min
12: 70.4 percent / Jones reagent / acetone / 0.5 h / Ambient temperature
13: 1.) NaOH; 2.) Et3N / 1.) aq. MeOH, 50 deg C, 2 h; 2.) CH2Cl2, 0 deg C, 1 h
14: oxalyl chloride / benzene / 1 h / Ambient temperature
15: K2CO3 / tetrahydrofuran / 3 h / 0 °C
16: K2CO3, NaBH4 / dimethylformamide / 40 h / 130 - 135 °C
17: 85.9 percent / NaIO4 / methanol; H2O / 5 h / Ambient temperature
18: n-butyl lithium/diisopropylamine / hexane; tetrahydrofuran / -65 deg C, 30 min then 0 deg C, 4.5 h
With
sodium hydroxide; sodium tetrahydroborate; sodium periodate; lithium aluminium tetrahydride; n-butyllithium; perchloric acid; jones reagent; titanium(III) chloride; oxalyl dichloride; Zeolite A-3; ammonium acetate; hydrogen; sodium methylate; sodium acetate; acetic anhydride; potassium carbonate; toluene-4-sulfonic acid; triethylamine; diisopropylamine; triphenylphosphine; diethylazodicarboxylate;
palladium on activated charcoal;
In
tetrahydrofuran; pyridine; methanol; diethyl ether; hexane; water; ethyl acetate; N,N-dimethyl-formamide; acetone; benzene;
DOI:10.1248/cpb.36.4722