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Alectoronic acid

Fig. 37. A a-Alectoronic acid, GE. Bar 100 xm. B a-Alectoronic acid with a-coUatolic acid [from Cetrelia chicitae (W.Culb.) W. Culb. et C. Culb., GE. Bar 100 im. C Colensoic acid, GE. Bar 100 im. D a-CoUatolic acid, GE. Bar 100 Lim... Fig. 37. A a-Alectoronic acid, GE. Bar 100 xm. B a-Alectoronic acid with a-coUatolic acid [from Cetrelia chicitae (W.Culb.) W. Culb. et C. Culb., GE. Bar 100 im. C Colensoic acid, GE. Bar 100 im. D a-CoUatolic acid, GE. Bar 100 Lim...
Hydroxybarbatic acid Nephroarctin a-Alectoronic acid Lutein... [Pg.117]

Elix JA, Yu J (1993) New lichen (3-orcinol depsidones and their congenors. J Hattori Bot Lab 74 317-323 Elix JA, Ferguson BA, Sargent MV (1974) The structure of alectoronic acid and related lichen metabolites. Aust J Chem 27 2403-2411... [Pg.455]

The best known depsidones are physodic acid, lobaric acid, norlobaridone, grayanic acid, alectoronic acid, diploicin, 4-0-methylphysodic acid, a-collatolic acid, lividic acid and variolaric acid. [Pg.10]

Parmotrema nilgherrense Alectoronic acid Depsidones APP Bactericidal activity Verma et al. (2011)... [Pg.186]

Elix, Ferguson, and Sargent (727) have studied the tautomerism of alectoronic acid (377), a-collatolic acid (382) and related depsides. The n.m.r. spectrum of alectoronic acid (Scheme 48) at ambient temperature exhibited a sharp two proton signal (8 4.06) due to the benzylic methylene protons of the A-ring side chain and a broad two proton signal (4.05 — 3.10) due to the protons H and Hg. At — 40 " C the signal for and Hg appeared... [Pg.183]

Many /5-orcinol depsidones discolor and decompose slowly without melting at temperatures above 240°-250° C, the decomposition being dependent upon the heating rate. For physodalic acid a decomposition range of 230°-260° C has been given, for salazinic acid 260°-280° C, and for fumarpro-tocetraric acid 245°-260°C. Presence of the solvent of crystallization may alter the mp drastically. Alectoronic acid (from benzene) melts at 193° C,... [Pg.648]

Methylphysodone (117) was isolated from Pseudevernia fur-furacea (339). 3-Alectoronic acid (118) and P-collatolic acid (119) are diphenyl ethers from Asahinea chrysantha (476) and A. scholanderi (476, 672) and exhibit an equilibrium between the keto-acid and lactol tautomers. 2" -0-Ethyl-P-alectoronic acid (120) from Alectoria sarmen-tosa (327) is probably an artefact formed during extraction by reaction of P-alectoronic acid with ethanol. [Pg.80]

See other pages where Alectoronic acid is mentioned: [Pg.14]    [Pg.18]    [Pg.45]    [Pg.45]    [Pg.45]    [Pg.46]    [Pg.49]    [Pg.75]    [Pg.114]    [Pg.114]    [Pg.229]    [Pg.232]    [Pg.233]    [Pg.314]    [Pg.137]    [Pg.182]    [Pg.183]    [Pg.184]    [Pg.224]    [Pg.39]    [Pg.638]    [Pg.58]    [Pg.246]   
See also in sourсe #XX -- [ Pg.183 , Pg.184 ]



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A-Alectoronic acid

P-Alectoronic acid

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