4670-22-8Relevant academic research and scientific papers
New Depsides from the Lichen Lecanora planaica
Elix, John A.,Barclay, Caroline E.,Lumbsch, H. Thorsten
, p. 1199 - 1204 (2007/10/02)
The new depsides hyperplanaic acid (4), isohyperplanaic acid (5) and superplanaic acid (6) have been detected in the lichen Lecanora planaica and the structure of these metabolites has been established by unambiguous synthesis.
Two New Diphenyl Ethers and a New Depside from the Lichen Micarea prasina Fr.
Elix, John A.,Jones, Alan J.,Lajide, Labunmi,Coppins, Brian J.,James, Peter W.
, p. 2349 - 2364 (2007/10/02)
Two new diphenyl ethers, 4-(2-carboxy-3-heptyl-5-methoxyphenoxy)-2-heptyl-6-hydroxybenzoic acid (micareic acid) (13),4-(2-carboxy-3-heptyl-5-methoxyphenoxy)-2-heptyl-6-hydroxy-3-methoxybenzoic acid (methoxymicareic acid) (27) and a new depside, 4-(2-hepty
Long-chain Phenols. Part 16. A Novel Synthesis of Homologous Orsellinic Acids and their Methyl Ethers
Durrani, Aziz A.,Tyman, John H. P.
, p. 1658 - 1666 (2007/10/02)
By the novel reaction of 3,5-dimethoxyfluorobenzene with n-alkyl-lithium compounds, followed by carbonation, homologous orsellinic acid dimethyl ethers (6-alkyl-2,4-dimethoxybenzoic acids) have been obtained.The reactions proceeded best with the homologues of methyl-lithium.These reactions are considered to occur by way of 3,5-dimethoxybenzyne. 2,4-Dimethoxyfluorobenzene did not form an aryne but gave 3-fluoro-2,6-dimethoxybenzoic acid instead.Decomposition with water of alkyl-lithium reaction mixtures from 3,5-dimethoxyfluorobenzene yielded 5-n-alkylresorcinol dimethyl ethers.Demethylaton of 6-alkyl-2,4-dimethoxybenzoic acids with boron trichloride proceeded partially and selectively to give the 6-alkyl-2-hydroxy-4-methoxybenzoic acids, and completely with aluminium chloride to give the homologous orsellinic acids.Boron tribromide was less effective, but readily gave the 5-alkyl resorcinols from the corresponding dimethyl ethers.
