Multi-step reaction with 12 steps
1: 97 percent / p-TsOH / benzene / 19 h / Heating
2: 76 percent / N-bromosuccinimide / CCl4 / 1.3 h
3: 1.) NaBH4, 2.) p-TsOH / 1.) i-PrOH, 2.) acetone, reflux, 2 h
4: 64 percent / PCC / CH2Cl2 / 11 h / Heating
5: 88 percent / dimethylformamide / 15 h / 25 °C
6: 99 percent / diethyl ether; ethyl acetate / 15 h / 0 °C
7: 62 percent / (i-Bu)2AlH / CH2Cl2 / 3 h / 0 °C
8: PCC, NaOAc / CH2Cl2 / 13 h / 25 °C
9: NaN3 / LiCl / dimethylformamide / 15 h / 25 °C
10: 94 percent / diethyl ether / 3 h / 25 °C
11: 2.) NaBH3CN / 1.) THF, 25 deg C, 7 h, 2.) MeOH, 25 deg C
12: 1.) 50percent aq. TFA, 2.) H2 / 2.) 10percent Pd/C / 1.) CHCl3, 0 deg C, 20 min
With
sodium tetrahydroborate; N-Bromosuccinimide; sodium azide; hydrogen; sodium acetate; diisobutylaluminium hydride; sodium cyanoborohydride; toluene-4-sulfonic acid; pyridinium chlorochromate; trifluoroacetic acid;
palladium on activated charcoal; lithium chloride;
In
tetrachloromethane; diethyl ether; dichloromethane; ethyl acetate; N,N-dimethyl-formamide; benzene;
DOI:10.1021/ja00206a059