Dimethylformamide → HCID 22152297, compound

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Reaction Conditions

Reaction Steps

To a mixture of 10.60 g (60.0 mmol) of 5-methoxy-1,1-dimethylindane (see U.K. Patent Application No. GB 2,067,195 A for a method of obtaining this compound) and 6.5 g (90.0 mmol) of dimethylformamide was added 11.5 g (75.0 mmol) of phosphorous oxytrichloride. The mixture was heated at 100° C. for 5 h. The reaction mixture was cooled to ambient temperature and poured onto 100 g of ice. The aqueous residue was extracted with ether. The organic phase was washed with saturated sodium bicarbonate solution, dried and evaporated. The residue was chromatographed on silica gel (70 g) using a gradient from hexane to 2:98 (v/v) ether:hexane as eluent, There was obtained 4.86 g (23.8 mmol, 40%) of 1,1-dimethyl-5-methoxyindan-6-carboxaldehyde as a white solid after crystallization from hexane mp 51°-52° C.

Provenance & Evidence