Hydrochloric Acid → HCID 53674838, compound

Participants

Reaction Steps

A mixture of 25 g. of methyl 6-methoxy-1-hydroxy-1,2,3,4-tetrahydro-2-naphthylacetate, 38 g. of 1-diethylamino-1,1,2-trifluoro-2-chloroethane and 150 ml. of methylene chloride are allowed to stand for 24 hours. The fluorination reaction mixture is added to 250 ml. of water containing 12 g. of hydrogen chloride; the resulting mixture is separated and the methylene chloride phase is washed with water, dried over sodium sulfate, and evaporated to yield methyl 6-methoxy-1-fluoro-1,2,3,4-tetrahydro-2-naphthylacetate and 6-methoxy-1,2-dihydro-2-naphthylacetate. The mixture is separated on alumina eluting with acetone: diethyl ether (1:4) and the separated fractions are identified by ultraviolet spectroscopy. The fraction containing methyl 6-methoxy-1-fluoro-2-naphthylacetate is evaporated and the residue is refluxed with 23 g. of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone and 500 ml. of xylene for six hours. The cooled mixture is filtered and chromatographed on alumina eluting with chloroform. The fraction containing the product is evaporated to yield methyl 6-methoxy-1-fluoro- 2-naphthylacetate.

Provenance & Evidence