Multi-step reaction with 28 steps
1: 100 percent / K2CO3 / methanol / 4 h / 25 °C
2: 100 percent / pyridinium p-toluenesulfonate / CH2Cl2 / 1.) 0 deg C, 2 h, 2.) 3 h
3: 1.) BH3*THF, 2-methyl-2-butene, 2.) aq. NaOH, aq. H2O2 / 1.) THF, 1 h, 2.) 15 min
4: 45 percent / H2 / Pd(OH)2 / ethyl acetate / 3 h
5: 100 percent / imidazole / dimethylformamide / 1 h / 0 °C
6: 1.) BF3*THF, 2.) aq. NaOH, aq. H2O2 / 1.) THF, 0 deg C, 1 h, 2.) 15 min
7: 1.) KH / 1.) THF, 0 deg C, 15 min, 2.) THF, 3 h
8: 86 percent / amberlyst-15 (H+) / methanol / 0.75 h / 25 °C
9: 85 percent / pyridine / 4 h / 0 °C
10: 91 percent / dimethylsulfoxide / 2 h / 70 °C
11: DIBAL / CH2Cl2 / 0.75 h / -78 °C
12: 89 percent / benzene / 1 h / 25 °C
13: 1.) DMSO, oxalyl chloride, 2.) triethylamine / 1.) CH2Cl2, -78 deg C, 45 min, 2.) 15 min
14: 81 percent / CH2Cl2; toluene / 4 h / -10 °C
15: 100 percent / 1,2-dichloro-ethane / 3 h / 25 °C
16: 95 percent / DIBAL / CH2Cl2; hexane / 0.75 h / -78 °C
17: 80 percent / diethyl L-tartrate, Ti(O-i-Pr)4, t-BuOOH / CH2Cl2; 1,2-dichloro-ethane / 16 h / -20 °C
18: SO3-pyr, Et3N / CH2Cl2; dimethylsulfoxide / 2 h / 0 °C
19: 1.) Ph3P / 1.) CH2Cl2, 0 deg C, 1 h, 2.) -78 deg C, 20 min
20: 96 percent / n-Bu4NF / tetrahydrofuran / 0.33 h / 0 °C
21: 83 percent / camphorsulfonic acid / CH2Cl2 / 0.75 h / 0 °C
22: 100 percent / CH2Cl2 / 1 h / 25 °C
24: 1.) CuI / 1.) THF, -40 deg C, 45 min, 2.) -78 deg C, 1,5 h
25: 100 percent / pyridinium p-toluenesulfonate / methanol / 1 h / 25 °C
26: 95 percent / DBU / benzene / 1.5 h / 70 °C
27: 100 percent / DIBAL / CH2Cl2; hexane / 0.75 h / -78 °C
28: 92 percent / Et3SiH, BF3*Et2O / CH2Cl2 / 0.08 h / -10 °C
With
pyridine; 1H-imidazole; titanium(IV) isopropylate; triethylsilane; tert.-butylhydroperoxide; sodium hydroxide; copper(l) iodide; borane-THF; 2-methyl-but-2-ene; oxalyl dichloride; boron trifluoride-tetrahydrofuran complex; pyridine-SO3 complex; diethyl (2R,3R)-tartrate; Amberlyst-15 (H+); camphor-10-sulfonic acid; boron trifluoride diethyl etherate; tetrabutyl ammonium fluoride; hydrogen; dihydrogen peroxide; pyridinium p-toluenesulfonate; potassium hydride; diisobutylaluminium hydride; potassium carbonate; dimethyl sulfoxide; 1,8-diazabicyclo[5.4.0]undec-7-ene; triethylamine; triphenylphosphine;
palladium dihydroxide;
In
tetrahydrofuran; methanol; hexane; dichloromethane; dimethyl sulfoxide; ethyl acetate; 1,2-dichloro-ethane; N,N-dimethyl-formamide; toluene; benzene;
DOI:10.1021/ja00199a029