- Synthesis method of 2,3,4-trihydroxyl benzaldehyde
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The invention provides a synthesis method of 2,3,4-trihydroxyl benzaldehyde, which is characterized in that pyrogallol is used as an initial raw material, and the synthesis of 2,3,4-trihydroxyl benzaldehyde comprises three steps of phenolic hydroxyl protection, formylation and de-protection. The method has the advantages of cheap and easily available raw materials, simple operation, high product yield and purity, and small amount of three wastes, and has excellent economic and environmental benefits.
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Paragraph 0024-0026
(2021/05/26)
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- Monoacrylates of trihydric phenols and method for producing same
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Compounds of the general formula I STR1 in which R is a hydrogen or halogen atom, a cyanide or an alkyl group having 1-4 carbon atoms and R1 is a hydrogen or halogen atom, nitro, alkyl, alkoxy, aryl, aryloxy, acyl or alkoxycarbonyl group, are prepared by esterifying two adjacent OH groups to give the cyclic carbonate, esterifying the free OH group with (meth)acrylic acid and selectively hydrolyzing the carbonate. The compounds are free of polyunsaturated impurities and can be used for preparing purely linear polymers.
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