How to use Protocatechuic-acid in a sentence

protocatechuic-acid
  • More important are Kekule's observations that nitrous acid oxidizes pyrocatechol or [I.2]-dioxybenzene, and protocatechuic acid or [3.4]- dioxybenzoic acid to dioxytartaric acid, (C(OH) 2 COOH) 2 (Ann., 1883, 221, p. 230); and 0.

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  • Conversely, by heating protocatechuic acid with potash and methylene iodide, piperonylic acid was regained.

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  • These results show that piperonylic acid is the methylene ether of protocatechuic acid.

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  • Alkali fusion of eugenol gives protocatechuic acid.

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  • Hydrolysis by alkaline solutions gives a sugar and caffeic acid; whilst fusion with potassium hydroxide gives protocatechuic acid.

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  • Moringa-tannin or maclurin, C1,H1006 H20, found in Morus tinctoria, hydrolyses on fusion with caustic potash to phloroglucin and protocatechuic acid.

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