Ethyl diethoxyacetate → HCID 66643980, compound

Participants

Reaction Steps

To an ice-cooled mixture of 2-[3-bromo-4-(methyloxy)phenyl]ethanol (9.5 g, 41 mmol) and ethyl bis(ethyloxy)acetate (8.7 g, 48 mmol) in 60 mL of CH3NO2 was added TiCl4 (31.2 g, 169 mmol) over a period of 20 min. After stirring for 10 min, the ice bath was removed and the mixture was allowed to stir at room temperature over night. The mixture was poured onto ice/aqueous 1N HCl. Extracted by DCM and backwashed with 1N HCl and brine, dried over anhydrous sodium sulfate and concentrated. The residue was purified via column chromatography to give methyl 6-bromo-7-(methyloxy)-3,4-dihydro-1H-isochromene-1-carboxylate.

Provenance & Evidence