Hydrochloric Acid → HCID 18670389, compound

Participants

Reaction Conditions

Reaction Steps

200 mg of (10-methoxymethyl-10H-pyrazino[2,3-b][1,4]-benzothiazin-8-ylmethyl)acetonitrile was dissolved in 5 ml of dimethyl sulfoxide. After adding 200 mg of powdered potassium hydroxide, the resulting mixture was heated to 40 to 60° C. for 10 minutes. Then the reaction mixture was distributed into 1 N hydrochloric acid and ethyl acetate. The organic layer was extracted, washed successively with a saturated aqueous solution of sodium bicarbonate and water and dried over anhydrous magnesium sulfate. After distilling off the solvent under reduced pressure, the residue was purified by silica gel column chromatography (eluted with dichloromethane/methanol) to thereby give 35 mg of the title compound as yellow crystals.

Provenance & Evidence