Title: 2,6-Dimethoxyquinone
CAS Registry Number: 530-55-2
CAS Name: 2,6-Dimethoxy-2,5-cyclohexadiene-1,4-dione
Additional Names: 2,6-dimethoxybenzoquinone
Molecular Formula: C8H8O4
Molecular Weight: 168.15
Percent Composition: C 57.14%, H 4.80%, O 38.06%
Literature References: Obtained from pyrogallol-1,3-dimethyl ether-2-acetate upon oxidation with potassium dichromate: Hofmann, Ber. 11, 337 (1878); or by heating with nitric acid in alc soln: Graebe, Hess, Ann. 340, 237 (1905); by treating pyrogallol trimethyl ether with nitric acid: Will, Ber. 21, 608 (1888); from syringa acid: Graebe, Martz, ibid. 221; from sinapic acid: Gadamer, Ber. 30, 2333 (1897); from antiarole by oxidation with ferric chloride: Baker, J. Chem. Soc. 1928, 1029.
Properties: Monoclinic golden-yellow prisms from acetic acid, mp 256°. Sublimes easily. Volatile with steam. Slightly sol in hot water, in ether, in alcohol; freely sol in hot glacial acetic acid and in alkaline solns.
Melting point: mp 256°

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