Results 141 to 150 of about 2,622 (202)

Characterization of a Pure Isolate from <i>Atalantia ceylanica</i> Leaves and Its Biological Activities. [PDF]

open access: yesBiomolecules
Ulpathakumbura S   +7 more
europepmc   +1 more source

Electronic relaxation pathways in thio-acridone and thio-coumarin: two heavy-atom-free photosensitizers absorbing visible light.

open access: yesPhys Chem Chem Phys
Acquah C   +8 more
europepmc   +1 more source
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Acridone Alkaloids

The Alkaloids Chemistry and Biology, 2017
There have been substantial developments in the chemistry and biology of the acridone alkaloids in the 16years since the topic was last reviewed in this series of monographs (2000). The present survey covers the literature from mid-1999 to 2016. A brief overview of the biosynthesis of acridone alkaloids is followed by details of the occurrence and ...
Joseph P. Michael
exaly   +3 more sources

N-Substituted Acridone Alkaloids From Toddaliopsis Bremekampii (Rutaceae: Toddalioideae) of South-Central Africa

open access: yesPhytochemistry, 2005
Toddaliopsins A-D, four novel 1,2,3-trioxygenated acridone alkaloids, have been isolated from the leaves of Toddaliopsis bremekampii. Toddaliopsins B-D are the first reported acridone alkaloids with substituted N-methyl groups, in the light of which the ...
Dulcie Mulholland, Philip H Coombes
exaly   +3 more sources

Acridone studies. VI. Bromination of acridones in chloroform

Australian Journal of Chemistry, 1969
In chloroform and acetic acid, N-methylacridone and methoxylated derivatives rapidly form 1 : 2 adducts with bromine, formulated as hypobromite salts. On gentle warming these decompose to the monobromo substitution product. Hydroxylated acridones appear to also add bromine to the substituted ring, forming products which are highly reactive to water and
RH Prager, HM Thredgold
openaire   +1 more source

Transformation of Acridone Synthase to Chalcone Synthase [PDF]

open access: yesFEBS Letters, 2001
Acridone synthase (ACS) and chalcone synthase (CHS) catalyse the pivotal reactions in the formation of acridone alkaloids or flavonoids. While acridone alkaloids are confined almost exclusively to the Rutaceae, flavonoids occur abundantly in all seed‐bearing plants.
Richard Lukačin   +2 more
exaly   +3 more sources

Antileishmanial and Antifungal Acridone Derivatives From the Roots of Thamnosma Rhodesica

open access: yesPhytochemistry, 2004
Eight furanocoumarins, one coumarin and four acridone derivatives have been identified in the roots of Thamnosma rhodesica (Rutaceae). Rhodesiacridone, one of these acridone derivatives, is reported here for the first time.
Jacques Mauel, Kurt Hostettmann
exaly   +2 more sources

Acridones: Strongly Emissive HIGHrISC Fluorophores

The Journal of Physical Chemistry Letters, 2021
An acridone derivative (N-methyl-difluoro-acridone, NMA-dF) is characterized with respect to its utility as an emitter in organic light emitting diodes (OLEDs). Using steady-state and time-resolved spectroscopy as well as quantum chemistry, its ability to convert singlet and triplet excitons into light was scrutinized.
Kristoffer A. Thom   +8 more
openaire   +2 more sources

9(10H)-Acridone

Acta Crystallographica Section C Crystal Structure Communications, 1995
The molecular packing arrangement in C 13 H 9 NO is characterized by two major interaction types. The first comprises N−H...O hydrogen bonds between glide-related molecules, with an N...O distance of 2.782 (3) A, such that each molecule is hydrogen bonded to two adjacent molecules. The second consists of π−π interactions between molecules stacked along
G. D. Potts, W. Jones
openaire   +1 more source

The mass spectra of acridones

Australian Journal of Chemistry, 1967
The mass spectra of 34 acridones have been determined and interpreted with the aid of both high-resolution measurements and deuterium labelling studies. The spectra contain pronounced molecular ions and are free of skeletal rearrangement fragments. The fragmentation patterns are dependent on the nature and position of substituents, and therefore mass ...
JH Bowie   +3 more
openaire   +1 more source

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