Diethanolamine → HCID 21497741, compound

Participants

Reaction Steps

To a cold (5° C.) solution of 3 moles of diethanolamine in tetrahydrofuran was added dropwise a solution of 3,5-di-t-butyl-4-hydroxybenzoyl chloride in benzene. The reaction mixture was stirred for about 1 hour, washed with water, separating the benzene layer from the aqueous layer. The benzene solution was evaporated to yieldan oil, which, after crystallization with aqueous ethanol, yielded a white solid. Small amounts of by-product compounds of Examples 1 and 3 were removed by fractional crystallization to yield N-hydroxyethyl-N-(3',5'-di-t-butyl-4'-hydroxybenzoyloxyethyl)-3,5-di-t-butyl-4-hydroxybenzamide; melting point 174°-178° C. When testedby the procedure of Example 2, the sample containing this compound lasted 1,200 hours, about 2.2 times as long as the control.

Provenance & Evidence