12-07760. Porphyrillic Acid [Archived]

Nomenclature

CAS number: 129-65-7
1,3-Dihydro-4,10-dihydroxy-8-methyl-3-oxoisobenzofuro[5,4-b]benzofuran-7-carboxylic acid; 1,7-dihydroxy-9-hydroxymethyl-3-methyl-4,8-dibenzofurandicarboxylic acid (8,9)-γ-lactone.
C16H10O7; mol wt 314.25.
C 61.15%, H 3.21%, O 35.64%.

Description and references

Constituent of lichens. Isoln from Haematomma coccineum Dicks., Lecanoreae, and structure studies: Wachtmeister, Acta Chem. Scand. 8, 1433 (1954); 10, 1404 (1956).

Chemical structure

Properties

Needles from ethanol or dioxane, mp 280-283° (dec) after darkening from 270°. Soluble in concd sulfuric acid, sodium carbonate, sodium hydroxide; sparingly sol in sodium bicarbonate.

Status

This monograph has been retired and is no longer subject to revision or update.