Protocatechuic Definition

Protocatechuic Sentence Examples

• 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.

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

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

• Alkali fusion of eugenol gives protocatechuic acid.

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