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US 4,302,602 AGranted
2-(N,N-Dimethylamino) indan-1,3-dione and method for manufacture thereof
AssigneeHokkaido Sugar Co., Ltd.
InventorMasaaki Ito
Life of this patent
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Abstract
A novel compound, 2-(N,N-dimethyamino) indan-1,3-dione, is useful as an ultraviolet absorbent and is produced from salicylaldehyde, betaine and acetic anhydride.
Claims3
2-(N,N-dimethylamino) indan-1,3-dione.
A method for the manufacture of 2-(N,N-dimethylamino) indan-1,3-dione, comprising the steps of mixing salicylaldehyde, betaine and acetic anhydride at a molar ratio of 1:1.about.3:1.about.20, and subsequently heating the resultant mixture.
Dependencies are inferred from the claim text.