Hydrochloric Acid → 3-{4-[4-(4,4-dihydroxy-piperidin-1-ylmethyl)-2-(4-trifluoromethyl-phenyl)-thiazol-5-ylmethoxy]-2-methoxy-phenyl}-4H-1,2,4-oxadiazol-5-one

Participants

Reaction Conditions

Reaction Steps

To a suspension of 10 mg of 3-{4-[4-(1,4-dioxa-8-aza-spiro[4.5]dec-8-ylmethyl)-2-(4-trifluoromethyl-phenyl)-thiazol-5-ylmethoxy]-2-methoxy-phenyl}-4H-1,2,4-oxadiazol-5-one in 2 mL of dioxane was added 0.5 mL of a 6N aqueous solution of hydrochloric acid. The resulting mixture was heated to 50° C. for 2 h and then poured into a saturated aqueous solution of sodium hydrogencarbonate and extracted with ethyl acetate. The organic extracts were washed with water, dried over magnesium sulfate, filtered and concentrated under reduced pressure. The crude product was recrystallized in acetonitrile to give 6 mg of 3-{4-[4-(4,4-dihydroxy-piperidin-1-ylmethyl)-2-(4-trifluoromethyl-phenyl)-thiazol-5-ylmethoxy]-2-methoxy-phenyl}-4H-1,2,4-oxadiazol-5-one as yellowish solid.

Provenance & Evidence