Multi-step reaction with 8 steps
1: 1.) ethylmagnesium bromide / 1.) THF, 2.) THF, 23 deg C, 16 h
2: 82 percent / chromium trioxide, conc. sulfuric acid / acetone / 1 h / 0 °C
3: 1.) (S)-Alpine Borane, 2.) sodium hydroxide, 30 percent hydrogen peroxide / 1.) THF, 23 deg C, 16 h, 2.) THF, 40 deg C, 3 h
4: 71 percent / triethylamine / CH2Cl2 / 15 h / Ambient temperature
5: 1.) n-butyllithium, 2.) boron trifluoride etherate / 1.) THF, hexane, 2.) THF, hexane, -78 deg C
6: 35.1 percent / 4-(dimethylamino)pyridine, diisopropylethylamine / 8 h / 45 °C
7: LiAlH4 / tetrahydrofuran / 1 h / Heating
8: 2.) 0.5 N aq. sulfuric acid / acetonitrile / 16 h / 23 °C
With
chromium(VI) oxide; dmap; sodium hydroxide; lithium aluminium tetrahydride; n-butyllithium; (S)-alpine borane; sulfuric acid; boron trifluoride diethyl etherate; ethylmagnesium bromide; dihydrogen peroxide; triethylamine; N-ethyl-N,N-diisopropylamine;
In
tetrahydrofuran; dichloromethane; acetone; acetonitrile;
DOI:10.1021/jo00389a038