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Picrolichenic acid

Threats to orceins, orcinol, picrolichenic acid, usnic acid, and other metabolites not shown in Table 16.2.5.1, reflect the sensitivity of lichens to environmental pollution worldwide (Huneck 1999). [Pg.285]

Other Activities. Picrolichenic acid was successfully used against intermittent fever (Alms 1832 Zopf 1907). Pulvinic acid dilactone has a pronounced cardiotonic activity (Nador et al. 1954), secalonic acid A has a phlogistic activity (Harada et al. 1974) and vulpinic acid an antiinflammatory activity (Foden et al. 1975). Usnic and diffractaic acids have analgesic and antipyretic activities comparable to amino-phenazone, phenylbutazone and hydrocortisone hemisuccinate (Dobrescu et al. 1993 Okuyama et al. 1995). [Pg.5]

T etrahydroxy-3-ethyl-naphtho-2,6-quinone a-Amyrin Lecanoric acid P-Ordnolcarboxylic acid Glomelliferonic acid 2,4-Dichlorolichexanthone Picrolichenic acid Taraxanthin Haemoventosin Orsellinic acid Lepranthin Siphulin Thiomelin 5-Chloro-4-0-... [Pg.117]

Deriv Methyl picrolichenate, needles (MeOH), mp 102-103.5 °C, from picrolichenic acid with an equimolar amount of CHjNj in EtjO at 0 °C in Imin... [Pg.355]

Davidson TA, Scott AI (1961) Oxidative pairing of phenolic radicals. Part II. The synthesis of picrolichenic acid. J Chem Soc 4075-4078... [Pg.453]

Elix JA, Calanasan CA, Archer AW (1991c) Sub-picrolichenic acid and superpicrolichenic acid, two new depsones from Pertusaria lichens. Aust J Chem 44 1487-1493... [Pg.456]

Wachtmeister CA (1958) Studies on the chemistry of lichens. XL Structure of picrolichenic acid. Acta Chem Scand 12 147-164... [Pg.472]

Depsone (picrolichenic acid) has a methylated 2-hydroxyl, and carbon-carbon coupling links the 1-position of the A ring and the 5-position of the B ring. [Pg.10]

The structure of picrolichenic acid can be further verified by abiogenetic type synthesis. Oxidation of anziaic acid 2-methylether (82) with active manganese dioxide goes directly to (79) through the diradical (83). [Pg.513]

Fig. 4. Structural relationships and possible formation of the five types of condensation products of orsellinic acid (6) or its homologues taking place in lichens. (9a) = olivetoric acid, (9b) = dihydropicrolichenic acid, (10) = physodic acid, (11) = picrolichenic acid, (12) = pannaric acid, (13) = pyxiferin. Fig. 4. Structural relationships and possible formation of the five types of condensation products of orsellinic acid (6) or its homologues taking place in lichens. (9a) = olivetoric acid, (9b) = dihydropicrolichenic acid, (10) = physodic acid, (11) = picrolichenic acid, (12) = pannaric acid, (13) = pyxiferin.
Several lichen acids have been studied from the pharmacological point of view. Alms (1832) recommended picrolichenic acid (subsequently identified by Zopf) for the treatment of Wechselfieber, prompted in the first place by its taste, reminiscent of quinine, and similarly Lebail later (1853). [Pg.550]

PD-,K-,C-,KC+ Alectoronic acid, a-collatolic acid, glomelliferic acid, lobaric acid, 4-0-methylphysodic acid, microphyllinic acid, norlobaridone, physodic acid, picrolichenic acid... [Pg.634]

The presence of many types of compounds other than pigments may also be recognized from lichen mass spectra (zeorin and dibenzofuranes San-tesson, 1969a atranorin Santesson, 1969c picrolichenic acid Santesson, 1969d). [Pg.644]

See other pages where Picrolichenic acid is mentioned: [Pg.28]    [Pg.140]    [Pg.2]    [Pg.41]    [Pg.50]    [Pg.86]    [Pg.355]    [Pg.531]    [Pg.228]   
See also in sourсe #XX -- [ Pg.15 ]

See also in sourсe #XX -- [ Pg.140 , Pg.141 ]

See also in sourсe #XX -- [ Pg.355 ]

See also in sourсe #XX -- [ Pg.511 ]



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Picrolichenic acid synthesis

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