4H-1-benzopyrans and lubricant compositions containing same

Details 4H-1-benzopyrans and lubricant compositions containing same 4H-1-benzopyrans and lubricant compositions containing same

1983-08-18

1985-08-27

Howard, Jacqueline V.

Compositions

Electrolytes for electrical devices

549399, 549405, 252407, C10M 120

Patent

active

045379203

ABSTRACT:
4H-1-Benzopyrans are prepared by reacting an aminomethylphenol with an alkali metal hydroxide or an alkaline earth metal hydroxide and a 1,3-diketone. The products are useful as antioxidants.

REFERENCES:
patent: 3796727 (1974-03-01), Deboer
patent: 4210663 (1980-07-01), Belletire
J. Org. Chem., vol. 36, No. 4, "The Preparation and Certain Reactions of 3-Formyl-4H Flavene" by G. A. Reynolds et al., pp. 600-602, 1971.

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