Sulfuric Acid → HCID 21184396, compound

Participants

Reaction Steps

To a suspension of 500 mg (1.71 mmol) of 4,9-dihydro-4,9-dioxo-2-(4-pyridyl)-naphtho[2,3-d]thiazole in 60 mL of methanol, 60 mL of a methanol solution containing 0.18 mL (1.74 mmol) of 98% sulfuric acid are added. After 1 h of reflux and complete cooling, the yellow precipitate obtained is filtered, rinsed several times with ethylic ether, and dried. In this manner, 500 mg of 4,9-dihydro-4,9-dioxo-2-(4-pyridyl)-naphtho[2,3-d]thiazole sulfate are obtained, in the form of yellow crystals.

Provenance & Evidence