5, 7‐Dihydroxy‐8‐methoxy‐chroman‐4‐on aus dem Zwiebelwachs von <i>Eucomis comosa</i>

Heller, Werner; Tamm, Christoph

doi:10.1002/hlca.19780610408

Cited by 13 publications

(8 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other authors (see refs. Heller, M. (1978), Woszczyna, A. (1980), Woszczyna, A. and Betkowski, W. (1982)) have also concluded that anisotropic models have in general a vacuum stage near an unavoidable initial singularity in which the energy-momentum tensor has no influence on the cosmic evolution.…”

Section: Nouraddin Mostafapoormentioning

confidence: 98%

Bianchi type-I universe models with nonlinear viscosity

Mostafapoor

Grøn

2012

Astrophys Space Sci

View full text Add to dashboard Cite

show abstract

Section: Nouraddin Mostafapoormentioning

confidence: 98%

Bianchi type-I universe models with nonlinear viscosity

Mostafapoor

Grøn

2012

Astrophys Space Sci

View full text Add to dashboard Cite

show abstract

“…5,7-Dihydroxy-8-methoxy-chroman-4-one has been isolated from Eucomis comosa by Heller and Tamm [50]. The co-occurrence of homoisoflavones with identical substitution in ring A of 13 and 108 is striking, and no biogenetic inference has been drawn from this observation.…”

Section: Biosynthesis Of Homoisoflavonoidsmentioning

confidence: 99%

Naturally Occurring Homoisoflavonoids: Phytochemistry, Biological Activities and Synthesis

Abegaz

Mutanyatta-Comar

Nindi

2007

Natural Product Communications

View full text Add to dashboard Cite

This review covers the phytochemical, biological properties, and synthesis of naturally occurring homoisoflavonoids. Homoisoflavonoids are a very important class of secondary metabolites whose numbers have grown from 20 in 1981 to 157 at the present time. They are found to occur in seven plant families. For the purpose of this review they are classified into five groups: 3-benzylchroman-4-ones, 3-benzylflavans, Δ3,9 and Δ2,3 3-benzylchroman-4-ones, benzocyclobutenes (scillascillins) and rearranged homoisoflavonoids (brazilin and related compounds). Biosynthetically, the 3-benzylchroman-4-ones and the 3-hydroxy-derivatives have been shown to arise from a chalcone precursor (sappanchalcone) and there is strong evidence that this isolable intermediate can be converted into the diverse structures such as the benzocyclobutenes (scillascillins) and the rearranged, brazilin-type compounds. Homoisoflavonoids possess a wide range of biological activities, including, antimicrobial, antimutagenic, anti-inflammatory, antidiabetic, etc, properties. The review also surveys the chemical synthesis of natural homoisoflavonoids. Analytical methods for the determination of these important metabolites are also reviewed. The last section is devoted to a brief review of the diagnostic NMR spectroscopic features of homoisoflavonoids. A comprehensive Table has also been compiled listing all known metabolites, their sources, melting points and optical rotation values (where available) and references.

show abstract

“…The dichloromethane extract yielded the seven known compounds (7, 10, 19, 20, 21, 22 and 23) and ve novel triterpenoids (24 [the aglycone of 25], 26, 27, 28 and 29). The methanol extract was found to contain the known homoisoavonoid 30 as well as nine novel lanosterol glycosides (31)(32)(33)(34)(35)(36)(37)(38)(39). 18 Eucomis autumnalis (Mill.)…”

mentioning

confidence: 99%

“…(as Eucomis punctata L'Herit). 37 The bulb wax of Eucomis comosa yielded the chroman-4-one 52 38 while an examination of the methanol extract of the fresh, air-dried bulbs gave ve homoisoavanones (47,48,50 and both the E and Z form of 6). 39 The same study included Eucomis pallidiora Baker subsp.…”

mentioning

confidence: 99%

The chemistry and biological activity of the Hyacinthaceae

2013

View full text Add to dashboard Cite

The Hyacinthaceae (sensu APGII), with approximately 900 species in about 70 genera, can be divided into three main subfamilies, the Hyacinthoideae, the Urgineoideae and the Ornithogaloideae, with a small fourth subfamily the Oziroëoideae, restricted to South America. The plants included in this family have long been used in traditional medicine for a wide range of medicinal applications. This, together with some significant toxicity to livestock has led to the chemical composition of many of the species being investigated. The compounds found are, for the most part, subfamily-restricted, with homoisoflavanones and spirocyclic nortriterpenoids characterising the Hyacinthoideae, bufadienolides characterising the Urgineoideae, and cardenolides and steroidal glycosides characterising the Ornithogaloideae. The phytochemical profiles of 38 genera of the Hyacinthaceae will be discussed as well as any biological activity associated with both crude extracts and compounds isolated. The Hyacinthaceae of southern Africa were last reviewed in 2000 (T. S. Pohl, N. R. Crouch and D. A. Mulholland, Curr. Org. Chem., 2000, 4, 1287-1324; ref. 1); the current contribution considers the family at a global level.

show abstract

5, 7‐Dihydroxy‐8‐methoxy‐chroman‐4‐on aus dem Zwiebelwachs von Eucomis comosa

Cited by 13 publications

References 17 publications

Bianchi type-I universe models with nonlinear viscosity

Bianchi type-I universe models with nonlinear viscosity

Naturally Occurring Homoisoflavonoids: Phytochemistry, Biological Activities and Synthesis

The chemistry and biological activity of the Hyacinthaceae

Contact Info

Product

Resources

About