Results 81 to 90 of about 831 (142)

Depsidone synthesis. XII. Some exploratory synthetic routes to highly functionalized depsidones

, 1978
Attempts to synthesize the depsidones virensic acid (1), physciosporin (2), and pannarin (3) by routes based on the Ullmann ether condensation and the Hems reaction are described.
MV Sargent, T Sala
core   +1 more source

Three New Depsidones From the Lichen Neofuscelia subincerta

, 1987
The depsidones , glomelliferonic acid (4)(8-hydroxy-3-methoxy-ll-oxo-l-(2-oxopentyl)-6- pentyl -11H-dibenzo[ b,e ] [1,4]dioxepin-7-carboxylic acid), loxodellonic acid (5) (8-hydroxy-3-methoxy-11-oxo-1-(2-oxopenty1)-6-propyl-llH-dibenzo[ b,e ][l,4 ...
JA Elix, GA Jenkins, UA Jenie
core   +1 more source

Neotricone and Norperistictic Acid, Two New Depsidones from the Lichen Genus Phaeographics

, 2015
The molecular structures of the two new depsidones identified in the lichens, neotricone and norperistictic acid, were investigated by studying the spectroscopic and chromatographic data.
Wardlaw, Judith, Kalb, Klaus, Elix, John
core   +1 more source

Lecideoidin and 3'-Dechlorolecideoidin, New Depsidones from an Australian Lecidea (Lichen)

, 1979
The depsidones lecideoidin (3',5-dichloro-2',4-dihydroxy-1'-methoxycarbonyl-6,6'-dimethyldepsidone) (3) and 3'-dechlorolecideoidin (5-chloro-2',4-dihydroxy-1'-methoxycarbonyl-6,6'-dimethyldepsidone)(4) have been isolated from an Australian Lecidea ...
JA Elix, AJ Jones, DO Chester
core   +1 more source

Oxidation reactions are required to produce atranorin from acetate by alginate-immobilized cells of Cladonia verticillaris. [PDF]

, 2000
Atranorin, a p-depside of the b-orcinol series, is produced by several Cladonia species. Immobilized cells of Cladonia verticillaris in calcium alginate are able to produce atranorin when they are supplied with 1.0 mM acetate as a precursor.
Fontaniella, B., Pereira, E.C., Vicente, C., Sebastián, B.   +3 more
core  

Four new Caloplaca species with depsidones from Australia.

, 2011
Four new Caloplaca species with depsidones are described, C. ochrolechioides S.Y. Kondr., Kärnefelt & Elix, with variolaric and isosubnotatic acids, C. phaeocincta S.Y. Kondr. & Elix, C. sconensis S.Y.Kondr., Kärnefelt & A.Thell, and C.
Elix, John A., Thell, Arne, Kondratyuk, Sergey Y., Kärnefelt, Ingvar   +3 more
core  

The structure of two new depsidones from the lichen Parmelia notata

, 1972
Two new depsidones, 4-O-methylhypoprotocetraric acid [l'-carboxy-2'- hydroxy-4-methoxy-3,3',6,6'-tetramethyldepsidone, (1)] and notatio acid [1'- carboxy-2'-hydroxy-4-methoxy-3,6,6'-trimethyldepsidone, (2)], have been isolated from the Australian ...
S Kurokawa, JA Elix, MV Sargent, TM Cresp   +3 more
core   +1 more source

The identification of further new depsidones in the lichen Parmelia notata

, 1984
Two new depsidones, 8-hydroxy-3-methoxy-1,6-dimethyl-11-oxo-11 H-dibenzo[b,e][1,4]dioxepin-7- carboxylic acid (subnotatic acid) (5) and 8-hydroxy-3-methoxy-1,6,9-trimethyl-11-oxo-11 H- dibenzo[b,e][1,4]dioxepin-7-carboxylic acid (isonotatic acid) (7 ...
L Lajide, JA Elix
core   +1 more source

Two New Depsidones From the Lichen Erioderma phaeorhizum Vainio sensu lato

, 1993
The depsidones hypophysciosporin (methyl 2-chloro-3,8-dihydroxy-1,4,6,9-tetramethyl-11-oxo-11H-dibenzo[ b,e ][1,4]dioxepin-7-carboxylate) (9) and 3-O-methylhypophysciosporin (methyl 2-chloro-8-hydroxy-3-methoxy-1,4,6,9-tetra-11-oxo-11H-dibenzo[ b,e ][1,
JA Elix, A Binhamat, MW Binsamsudin, L Bindin   +3 more
core   +1 more source

The structure of chalybaeizanic acid and quaesitic acid, two new lichen depsidones related to salazinic acid

, 2015
The depsidones chalybaeizanic acid (1,4,10-trihydroxy-8-methyl-3,7-dioxo-1,3-dihydro-7H-isobenzofuro-[4,5-b][1,4] benzodioxepin-5,11-dicarbaldehyde) (4) and quaesitic acid (11-formyl-1,4,10-trihydroxy-8-methyl-3,7-dioxo-1,3-dihydro-7H-isobenzofuro[4,5- b]
Wardlaw, Judith, Elix, John
core   +1 more source