Hydrochloric Acid → HCID 15595179, compound

Participants

Reaction Steps

A mixture of 0.706 g of rac.-2,3-dihydro-2-[6-[(tetrahydro-2H-pyran-2-yl)oxy]hexyl]-7-hydroxy-2-methyl-8-propyl-4H-1-benzopyran-4-one, 16 ml of N,N-dimethylformamide, and 0.477 g of anhydrous potassium carbonate was stirred at room temperature for 2 hours. A 0.33 ml (0.53 g) portion of methyl bromoacetate was added and stirring was continued for 17.5 hours at room temperature. The mixture was poured into water and the pH was adjusted to 7 with 0.5N hydrochloric acid. The organic product was isolated by extraction with 3 portions of ether. The ether extracts were combined, washed with water and brine, dried over anhydrous magnesium sulfate filtered and concentrated in vacuo to give a yellow oil. This material was purified by high pressure liquid chromatography (HPLC) (silica gel, 2:1 hexane-ethyl acetate) yielding 0.589 g (70.8%) of rac.-[[3,4-dihydro-2-[6-[(tetrahydro-2H-pyran-2-yl)oxy]hexyl]-2-methyl-4-oxo-8-propyl-2H-1-benzopyran-7-yl]oxy]acetic acid methyl ester as a pale-yellow oil.

Provenance & Evidence