Multi-step reaction with 14 steps
1: KH / tetrahydrofuran / 1.) -78 to -20 deg C, 2 h; -5 deg C, 1 h, 2.) 0 deg C, 1 h
2: H2 / PtO2 / methanol / 50 h / Ambient temperature
3: diethyl ether
4: 93 percent / pyridinium toluene p-sulfonate / acetone; H2O / 2.5 h / Heating
5: 1.) Bu2BOMe, 2.) NaBH4 / 1.) THF, MeOH, -78 deg C, 20 min, 2.) THF, MeOH, -78 deg C, 15 h
6: 96 percent / p-TsOH*pyridine / 15 h / Ambient temperature
7: 93 percent / LDA, DMPU / hexane; tetrahydrofuran / 1.) -78 deg C, 1 h, 2.) -78 deg C, 46 h; -78 to -10 deg C, 8 h
8: TsOH*pyridine / methanol / 2.5 h
9: KOH, H2O / methanol; tetrahydrofuran / 15 h / 40 °C
10: 86 percent / Et3N, 2-chloro-1-methylpyridinium iodide / CH2Cl2 / 1 h / Heating
11: 90 percent / imidazole / dimethylformamide / 15 h / Ambient temperature
12: 97 percent / NaOBn / tetrahydrofuran / 6 h / Ambient temperature
13: 97 percent / DMAP, pyridine / 48 h / Ambient temperature
14: 78 percent / AcO2H, KBr / acetic acid / 15 h / Ambient temperature
With
pyridine; 1H-imidazole; peracetic acid; dmap; 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone; potassium hydroxide; sodium tetrahydroborate; dibutylborinic acid methyl ester; 2-chloro-1-methyl-pyridinium iodide; water; hydrogen; pyridinium p-toluenesulfonate; potassium hydride; triethylamine; sodium phenyl-methanolate; potassium bromide; lithium diisopropyl amide;
platinum(IV) oxide;
In
tetrahydrofuran; methanol; diethyl ether; hexane; dichloromethane; water; acetic acid; N,N-dimethyl-formamide; acetone;