Multi-step reaction with 15 steps
1.1: L-Selectride / tetrahydrofuran / -70 - -65 °C
2.1: 39.52 g / imidazole / dimethylformamide / 20 °C
3.1: 83 percent / KIO4 / OsO4 / tetrahydrofuran; H2O / 48 h / 20 °C
4.1: 73 percent / m-CPBA / CHCl3; aq. phosphate buffer / 0 - 20 °C / pH 8
5.1: 73 percent / K2CO3 / methanol / 12 h / 20 °C
6.1: 80 percent / imidazole / dimethylformamide / 20 °C
7.1: 100 percent / 2,2,6,6-tetramethylpiperidine; n-BuLi; Et2AlCl / benzene; hexane; toluene / 3 h / 0 °C
8.1: NaH / tetrahydrofuran / 0.5 h / 20 °C
8.2: tetrabutylammonium iodide / tetrahydrofuran / 20 °C
9.1: 9-BBN / tetrahydrofuran / 0 - 20 °C
9.2: 5.5 g / aq. NaOH; H2O2 / tetrahydrofuran; ethanol / 23 h / 0 - 20 °C
10.1: 93 percent / TBAF / tetrahydrofuran / 3 h / 20 °C
11.1: 90 percent / p-toluenesulfonic acid monohydrate / dioxane / 24 h / 20 °C
12.1: 93 percent / TBAF / tetrahydrofuran / 20 °C
13.1: 2.3 g / DEAD; PPh3 / dioxane / 20 °C
14.1: 1.24 g / K2CO3 / methanol; tetrahydrofuran / 20 °C
15.1: 37 percent / PPh3; DEAD / dioxane / 20 °C
With
2,2,6,6-tetramethyl-piperidine; 1H-imidazole; 9-borabicyclo[3.3.1]nonane dimer; n-butyllithium; potassium metaperiodate; tetrabutyl ammonium fluoride; diethylaluminium chloride; L-Selectride; sodium hydride; potassium carbonate; toluene-4-sulfonic acid; 3-chloro-benzenecarboperoxoic acid; triphenylphosphine; diethylazodicarboxylate;
osmium(VIII) oxide;
In
tetrahydrofuran; 1,4-dioxane; methanol; phosphate buffer; hexane; chloroform; water; N,N-dimethyl-formamide; toluene; benzene;
1.1: Reduction / 2.1: silylation / 3.1: Oxidation / 4.1: Baeyer-Villiger reaction / 5.1: Deacetylation / 6.1: silylation / 7.1: Ring cleavage / 8.1: Metallation / 8.2: Etherification / 9.1: Addition / 9.2: Oxidation / 10.1: desilylation / 11.1: Cyclization / 12.1: desilylation / 13.1: Mitsunobu reaction / 14.1: Hydrolysis / 15.1: Mitsunobu reaction;
DOI:10.1021/jo972285c