Multi-step reaction with 6 steps
1.1: water; 2,3-dicyano-5,6-dichloro-p-benzoquinone / dichloromethane / 1.5 h / 0 °C / Inert atmosphere
2.1: dimethyl sulfoxide; oxalyl dichloride / dichloromethane / 1.25 h / -78 - -45 °C / Inert atmosphere
2.2: 20 °C / Inert atmosphere
3.1: titanium(IV) trichloride isopropoxide / dichloromethane / 1 h / -78 °C / Inert atmosphere
3.2: 48 h / -50 °C / Inert atmosphere
3.3: 24 h / 20 °C / Inert atmosphere
4.1: 2,6-dimethylpyridine / dichloromethane / 12 h / -78 - 20 °C / Inert atmosphere
5.1: lithium borohydride / methanol; diethyl ether / 12 h / 0 °C / Inert atmosphere
6.1: sodium hydrogencarbonate; Dess-Martin periodane / dichloromethane / 0.5 h / 0 °C / Inert atmosphere
With
2,6-dimethylpyridine; lithium borohydride; oxalyl dichloride; titanium(IV) trichloride isopropoxide; water; sodium hydrogencarbonate; Dess-Martin periodane; dimethyl sulfoxide; 2,3-dicyano-5,6-dichloro-p-benzoquinone;
In
methanol; diethyl ether; dichloromethane;
2.1: |Swern Oxidation / 2.2: |Swern Oxidation;
DOI:10.1021/ol5011278