Hydrochloric Acid → HCID 20069042, compound

Participants

Reaction Steps

A 60% dispersion of sodium hydride in mineral oil (0.39 g, 9.8 mmol) was washed with hexane and the hexane was decanted. DMSO (15 mL) was added to the sodium hydride and the resultant suspension was stirred vigorously. To the suspension was added a solution of 2.5 g (9.8 mmol) of 5,6-dihydroxy-3-phenyl-1,2,3,4-tetrahydro-1-naphthalenone, from Step 1, in 10 mL of DMSO. The mixture was stirred at ambient temperature for 80 min and 0.61 mL (9.8 mmol) of methyl iodide was added in one portion. The reaction mixture was stirred at ambient temperature overnight and then made acidic with 5% aqueous hydrochloric acid solution. The mixture was stirred for 30 min and then filtered. The filter cake was dissolved in 20% ethyl acetate in hexane and chromatographed on a silica gel column eluted with 20% ethyl acetate in hexane and 50% ethyl acetate in hexane to give a brown solid. The solid was crystallized from ethyl acetate to give 1.13 g (43% yield) of the title compound as white crystals.

Provenance & Evidence