2,5-Dihydroxycinnamic acid

2,5-Dihydroxycinnamic acid
Names
	Preferred IUPAC name (2E)-3-(2,5-Dihydroxyphenyl)prop-2-enoic acid
	Other names (2E)-3-(2,5-Dihydroxyphenyl)acrylic acid, grevillic acid
Identifiers
CAS Number	38489-67-7 ; 636-01-1 (non-specific) ;
3D model (JSmol)	Interactive image;
ChemSpider	6442618;
PubChem CID	181581;
UNII	6EHK92QE99 ;
	InChI InChI=1S/C9H8O4/c10-7-2-3-8(11)6(5-7)1-4-9(12)13/h1-5,10-11H,(H,12,13) Key: JXIPYOZBOMUUCA-UHFFFAOYSA-N;
	SMILES C1=CC(=C(C=C1O)C=CC(=O)O)O;
Properties
Chemical formula	C9H8O4
Molar mass	180.159 g·mol−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

2,5-Dihydroxycinnamic acid is a hydroxycinnamic acid derivative. It is an isomer of caffeic acid.

Preparation

2,5-Dihydroxycinnamic acid is produced by Elbs persulfate oxidation of o-coumaric acid.^[1]^[2]

^ Cain, J.C.; Greenaway, A.J. (1907). "Abstracts of Papers on Organic chemistry". Journal of the Chemical Society, Abstracts. 92: A741–A812. doi:10.1039/CA9079200741.
^ Otto, Neubauer; Flatow, L. (1907). "Synthesen von Alkaptonsäuren". Zeitschrift für Physiologische Chemie. 52 (3–4): 375–398. doi:10.1515/bchm2.1907.52.3-4.375.

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