Multi-step reaction with 19 steps
1: 90 percent / CeCl3*7H2O, NaBH4 / methanol / 0.25 h / 0 °C
2: 90 percent / PPTS / CH2Cl2 / 24 h / Ambient temperature
3: 87 percent / NaOMe / methanol / 15 h / Ambient temperature
4: 1.) NaH, imidazole / 1.) THF, 0 deg C, 40 min, 2.) 0 deg C, 1.5 h, 3.) 0 deg C, 30 min
5: 71 percent / AIBN, n-Bu3SnH / toluene / 15 h / Heating
6: 96 percent / PPTS / ethanol / 3 h / 50 °C
7: 74 percent / propionic acid / 2 h / 140 °C
8: 205 mg / t-BuOK / dimethylsulfoxide / 0.42 h / Ambient temperature
9: 87 percent / aq. NaHCO3, KI, I2 / tetrahydrofuran / 2 h / Ambient temperature
10: 91 percent / AIBN, n-Bu3SnH / benzene / 2 h / Ambient temperature
11: DIBAL / toluene / 0.17 h / -78 °C
12: 1.) n-BuLi / 1.) THF, hexane, 0 deg C, 20 min, 2.) THF, 60 deg C, 3 h
13: 92 percent / 2,6-lutidine / CH2Cl2 / 0.5 h / 0 °C
14: 1.) BH3*THF, 2.) aq. NaOH, aq. H2O2 / 1.) THF, 0 deg C, 2 h, 2.) 0 deg C, 1 h
15: 81 percent / MS-4A, tetrapropylammonium perruthenate, 4-methylmorpholine N-oxide / CH2Cl2 / 0.5 h / Ambient temperature
16: KN(SiMe3)2, Et3N / tetrahydrofuran / 0.33 h / 0 °C
17: Pd)OAc)2 / acetonitrile / 12 h / 0 °C
18: 93 percent / DIBAL / toluene / 0.25 h / -78 °C
19: 100 percent / n-Bu3NF / tetrahydrofuran / 144 h / Ambient temperature
With
1H-imidazole; 2,6-dimethylpyridine; palladium diacetate; sodium hydroxide; sodium tetrahydroborate; n-butyllithium; cerium(III) chloride; tetrapropylammonium perruthennate; borane-THF; 2,2'-azobis(isobutyronitrile); n-Bu3NF; potassium tert-butylate; dihydrogen peroxide; iodine; tri-n-butyl-tin hydride; sodium methylate; pyridinium p-toluenesulfonate; potassium hexamethylsilazane; sodium hydride; diisobutylaluminium hydride; sodium hydrogencarbonate; propionic acid; 4-methylmorpholine N-oxide; triethylamine; potassium iodide;
In
tetrahydrofuran; methanol; ethanol; dichloromethane; dimethyl sulfoxide; toluene; acetonitrile; benzene;
DOI:10.1016/S0040-4020(99)00004-6