Multi-step reaction with 9 steps
1.1: 76 percent / (S)-binol; Ti(i-PrO)4 / 120 h / -78 - -25 °C
2.1: imidazole / dimethylformamide / 6 h / 20 °C
3.1: BH3*THF / tetrahydrofuran / 24 h / 0 - 20 °C
3.2: aq. H2O2; NaOH / tetrahydrofuran / 0 - 20 °C
4.1: Jones reagent / acetone / 0.5 h / 0 °C
5.1: diethyl ether / 0.5 h / 0 °C
6.1: LDA / tetrahydrofuran / 1 h / -78 °C
7.1: 10-camphorsulfonic acid; H2O / methanol / 4 h / 20 °C
8.1: Et3N / CH2Cl2 / 1.5 h / -10 °C
9.1: 1,8-diazabicyclo[5.4.0]undec-7-ene / CH2Cl2 / 0.5 h / -10 °C
With
1H-imidazole; titanium(IV) isopropylate; jones reagent; borane-THF; (1S)-10-camphorsulfonic acid; water; (S)-[1,1']-binaphthalenyl-2,2'-diol; 1,8-diazabicyclo[5.4.0]undec-7-ene; triethylamine; lithium diisopropyl amide;
In
tetrahydrofuran; methanol; diethyl ether; dichloromethane; N,N-dimethyl-formamide; acetone;
4.1: Jones oxidation;
DOI:10.1002/anie.200290038