Hydrochloric Acid → HCID 68469636, compound

Participants

Reaction Steps

To a mixture of 3-oxaspiro[5.5]undecane-8,10-dione (0.182 g, 1 mmol) and 4-dimethylamino-pyridine (0.61 g; 5 mmol) is added dry chloroform (4 ml), and the mixture is stirred under an atmosphere of nitrogen at room temperature until the solid dissolves. To this solution is then added dry toluene (2 ml), and then a solution of 3,5-dimethylbiphen-4-yllead triacetate (1.2 mmol) in chloroform is added. The reaction mixture is heated under reflux for 1 hour, then cooled to room temperature, acidified to pH=1 with 2N aqueous hydrochloric acid, filtered and the filtrate is extracted with dichloromethane (2×40 ml). The organic extracts are combined, dried over anhydrous magnesium sulfate, filtered and the filtrate is evaporated in vacuo. The residue is purified by column chromatography over silica gel to give 9-(3,5-dimethylbiphenyl-4-yl)-3-oxa-spiro[5.5]undecane-8,10-dione.

Provenance & Evidence