Multi-step reaction with 5 steps
1: 1.) LDA / 1.) THF, hexane, -78 deg C, 30 min, 2.) THF, hexane, 10 min
2: 1.) ZnCl2, 2.) DIBALH / 1.) THF, RT, 30 min, 2.) THF, -78 deg C, 5 h
3: 95 percent / diisopropylethylamine / CH2Cl2 / 5 h / 40 °C
4: 1.) collidine, trifluoroacetic anhydride, 2.) aq. NaHCO3, NaBH4 / 1.) CH3CN, 0 deg C, 30 min, 2.) CH3CN, RT, 10 min
5: 94 percent / 50percent aq. NaOH, tetra n-butyl ammonium bromide / CH2Cl2
With
2,3,5-trimethyl-pyridine; sodium hydroxide; sodium tetrahydroborate; tetrabutylammomium bromide; diisobutylaluminium hydride; sodium hydrogencarbonate; N-ethyl-N,N-diisopropylamine; trifluoroacetic anhydride; zinc(II) chloride; lithium diisopropyl amide;
In
dichloromethane;
DOI:10.1016/0957-4166(94)80033-2