Multi-step reaction with 9 steps
1.1: potassium hydroxide / ethanol / 20 h / 0 °C
2.1: n-butyllithium / tetrahydrofuran; hexane / 0.5 h / -78 °C
2.2: 6 h / -78 °C
3.1: dmap / N,N-dimethyl-formamide / 36 h / 20 °C
4.1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / dichloromethane; water / 1.67 h / 0 °C
4.2: 0.67 h / -78 °C
4.3: 1.75 h / -78 - 20 °C
5.1: n-butyllithium / tetrahydrofuran; hexane / 0.5 h / 0 °C
5.2: 1.5 h / 0 °C
6.1: water; sodium hydroxide / ethanol / 25 h / 0 - 20 °C
7.1: 2,4,6-trichlorobenzoyl chloride; triethylamine / toluene; acetonitrile / 1.5 h / 20 °C
7.2: 19 h / 20 °C
8.1: pyridine hydrogenfluoride / tetrahydrofuran / 16 h / 0 - 20 °C
9.1: Dess-Martin periodane / dichloromethane / 2.25 h / 20 °C
With
dmap; n-butyllithium; 2,4,6-trichlorobenzoyl chloride; water; Dess-Martin periodane; pyridine hydrogenfluoride; triethylamine; 2,3-dicyano-5,6-dichloro-p-benzoquinone; potassium hydroxide; sodium hydroxide;
In
tetrahydrofuran; ethanol; hexane; dichloromethane; water; N,N-dimethyl-formamide; toluene; acetonitrile;
4.2: |Swern Oxidation / 4.3: |Swern Oxidation;
DOI:10.1002/chem.201202553