Multi-step reaction with 10 steps
1.1: 80 percent / KOH / 4 h / 20 °C
2.1: 93 percent / oxalyl chloride; DMSO; Et3N / CH2Cl2 / -55 - 20 °C
3.1: NaI; NaH / tetrahydrofuran / 8 h / -78 °C
4.1: 94 percent / DIBALH / tetrahydrofuran; toluene / -78 - 0 °C
5.1: (-)-D-diethyl tartrate; ti(OiPr)4; tert-butyl hydroperoxide / CH2Cl2; 2,2,4-trimethyl-pentane / 70 h / -20 °C
6.1: CuCN / diethyl ether / 1 h / -20 °C
6.2: diethyl ether / 2.5 h / -15 °C
6.3: 65 percent / NaIO4 / tetrahydrofuran; H2O / 1.5 h / 20 °C
7.1: 98 percent / Et3N / CH2Cl2 / 14 h / 20 °C
8.1: 89 percent / H2 / Pd(OH)2/C / ethyl acetate / 13 h / 20 °C
9.1: 58 percent / pyridinium chlorochromate / CH2Cl2 / 21 h / 20 °C
10.1: Mg / tetrahydrofuran / 0.83 h
10.2: 60 percent / tetrahydrofuran / 0.67 h / -78 °C
With
titanium(IV) isopropylate; tert.-butylhydroperoxide; potassium hydroxide; oxalyl dichloride; diethyl (2S,3S)-tartrate; hydrogen; sodium hydride; diisobutylaluminium hydride; magnesium; dimethyl sulfoxide; triethylamine; pyridinium chlorochromate; sodium iodide;
palladium dihydroxide;
In
tetrahydrofuran; 2,2,4-trimethylpentane; diethyl ether; dichloromethane; ethyl acetate; toluene;
2.1: Swern oxidation / 3.1: Horner-Wadsworth-Emmons olefination / 5.1: Katsuki-Sharpless asymmetric epoxidation;
DOI:10.1021/ol048321t