Multi-step reaction with 11 steps
1.1: DMSO; oxalyl chloride; Et3N / CH2Cl2 / 1 h / -78 °C
2.1: 28 g / CH2Cl2 / 20 °C
3.1: 84 percent / DIBAL-H / tetrahydrofuran; hexane / 2 h / 0 °C
4.1: (+)-diethyl tartrate; 4-Angstroem molecular sieves / Ti(OiPr)4 / CH2Cl2 / 0.5 h / -20 °C
4.2: 76 percent / t-BuOOH / CH2Cl2; 2,2,4-trimethyl-pentane / 20 h / -20 - -18 °C
5.1: CH2Cl2 / 15 h / 0 - 20 °C
6.1: aq. NaIO4 / methanol / 6 h
7.1: 94 percent / CH2Cl2 / 20 °C
8.1: 96 percent / DIBAL-H / hexane; tetrahydrofuran / 2 h / 0 °C
9.1: (-)-diethyl tartrate; 4 Angstroem molecular sieves / Ti(i-OPr)4 / CH2Cl2 / 0.5 h / -20 °C
9.2: 85 percent / t-BuOOH / CH2Cl2 / 20 h / -20 - -18 °C
10.1: CuI / tetrahydrofuran / 0.5 h / 0 °C
10.2: tetrahydrofuran / 15 h / 5 °C
10.3: 84 percent / aq. NaIO4 / methanol / 7 h
11.1: 97.5 percent / 2,6-lutidine / CH2Cl2 / 2 h / 0 - 20 °C
With
2,6-dimethylpyridine; sodium periodate; copper(l) iodide; oxalyl dichloride; 4 A molecular sieve; diisobutylaluminium hydride; dimethyl sulfoxide; (+)-Weinsaeure-diethylester; (-)-diethyl tartrate; triethylamine;
titanium(IV) isopropylate;
In
tetrahydrofuran; methanol; hexane; dichloromethane;
1.1: Oxidation / 2.1: Condensation / 3.1: Reduction / 4.1: Substitution / 4.2: Epoxidation / 5.1: Methylation / 6.1: Oxidation / 7.1: Condensation / 8.1: Reduction / 9.1: Substitution / 9.2: Epoxidation / 10.1: Transmetallation / 10.2: Methylation / 10.3: Oxidation / 11.1: Substitution;
DOI:10.1039/b000751j