Results 171 to 180 of about 2,277 (193)
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Chlorogenic acids and related depsides
The Botanical Review, 1964Isolation and Chemistry 668 General Isolation Procedures 668 The Chlorogenic Acids 671 Additional Quinic Acid Depsides 677 Other Phenylpropenoyl Depsides 680 Transesterification Reactions in Quinic Acid Depsides 681 The Chlorogenic Acid-Caffeine Complex ...
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Solid phase synthesis of depsides and depsipeptides
Tetrahedron Letters, 1999Abstract A general solid phase methodology for the synthesis of depside and depsipeptide chains from optically active α-hydroxy acids and α-amino acids is reported. The automated preparation of depsides (97% yield per cycle) made up from the same enantiomer [i.e. H-[( S )-Man] 8 -OH, 1 ] † by both enantiomers [i.e. H-[( R )-Man-( S )-Man] 4 -OH,
Oliver Kuisle +2 more
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ChemInform Abstract: New Depsides from Erioderma Lichens.
ChemInform, 1988AbstractThe known depside (Ia) and the new depsides (Ib) and (II) are isolated from the title lichens.
J. A. ELIX +4 more
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New Depsides in Stirtonia ramosa (Ascomycotina, Arthoniaceae)
The Bryologist, 1990Stirtonia ramosa, a corticolous crustose lichen from the Andaman Islands, contains two new para-depsides, 4-O-demethylsuperconfluentic and 2'-O-methylnorsuperphyllinic acids. Chemical structures are proposed from microchemical identification of the hydrolysis products of the depsides and their methyl esters.
Chicita F. Culberson +3 more
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Cleavage of depsides by tert-butyl alcohol
Phytochemistry, 1979Abstract Depsides have been found to cleave readily on prolonged heating with t -butyl alcohol to give t -butyl esters and the free phenols.
Frank W. Bachelor +2 more
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Synthesis of Further b-Ketoalkyl Lichen Depsides
Australian Journal of Chemistry, 1997The unambiguous total synthesis of the lichen depsides 2-O-methylglomelliferic acid (39), 4-O- methylhyperolivetoric acid (40), hyperconfluentic acid (41), microphyllinic acid (42), arthoniaic acid (43), 2′-O-methylmicrophyllinic acid (44), 2′-O-methylhyperphyllinic acid B (45), 4-O-methylsuperolivetoric acid (46), 2′-O-methylhyperphyllinic acid A (47)
John A. Elix, Judith H. Wardlaw
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Synthesis of para -olivetol depsides
Australian Journal of Chemistry, 1974The unambiguous synthesis of the lichen depsides, anziaic, perlatolic, 2'- O -methylanziaic, 2- O - methylperlatolic, 2'- O -methylperlatolic, 4- O -demethylplanaic, planaic, imbricaric and stenosporic acids is reported. Where necessary the phenolic and carboxy groups of the intermediate phenols were protected by O -benzylation until after the depside ...
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