Multi-step reaction with 12 steps
1.1: n-butyllithium / tetrahydrofuran
2.1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / dichloromethane
3.1: tetrabutyl ammonium fluoride / tetrahydrofuran
4.1: sulfur trioxide pyridine complex; triethylamine; dimethyl sulfoxide / dichloromethane
5.1: titanium tetrachloride; titanium(IV) isopropylate; silver(l) oxide; (S)-[1,1']-binaphthalenyl-2,2'-diol / dichloromethane
6.1: trifluoroacetic acid; water / tetrahydrofuran / 23 h / 50 °C
7.1: Selectfluor / water; acetonitrile / 0.5 h / 4 °C
8.1: triethylamine; dmap; 2,4,6-trichlorobenzoyl chloride / toluene
9.1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / dichloromethane; aq. phosphate buffer / 1 h / 20 °C / pH 7.2
10.1: sodium periodate; potassium permanganate / aq. phosphate buffer; tert-butyl alcohol / 0.75 h / 20 °C / pH 7.2 / Inert atmosphere
11.1: triethylamine; 2,4,6-trichlorobenzoyl chloride / toluene / 1 h / 20 °C
11.2: 2.25 h / 20 °C
12.1: palladium 10% on activated carbon; hydrogen / ethanol
With
titanium(IV) isopropylate; dmap; potassium permanganate; sodium periodate; n-butyllithium; 2,4,6-trichlorobenzoyl chloride; palladium 10% on activated carbon; tetrabutyl ammonium fluoride; water; hydrogen; (S)-[1,1']-binaphthalenyl-2,2'-diol; sulfur trioxide pyridine complex; titanium tetrachloride; dimethyl sulfoxide; Selectfluor; triethylamine; trifluoroacetic acid; 2,3-dicyano-5,6-dichloro-p-benzoquinone; silver(l) oxide;
In
tetrahydrofuran; aq. phosphate buffer; ethanol; dichloromethane; water; toluene; acetonitrile; tert-butyl alcohol;
4.1: |Parikh-Doering Oxidation / 8.1: |Yamaguchi Lactonization / 11.1: |Yamaguchi Lactonization / 11.2: |Yamaguchi Lactonization;
DOI:10.1016/j.tet.2014.11.026