Search engine for discovering works of Art, research articles, and books related to Art and Culture
Javascript must be enabled to continue!
Chemistry of Australian Lichens. II. A New Depsidone from Parmelia conspersa (Ehrh.) Ach
View through CrossRef
A new compound, norlobaridone, from Parmelia conspersa is shown to have structure Ia by conversion of its monomethyl ether (lobaridone (Ib)) into lobariol (IIb). The depsidone ring is readily cleaved by basic reagents to give products containing a new cyclic system and including an isomeric ?-enol lactone (IIIa), norlobariol (IIa), and the oxime anhydride (IVa) of the latter. Ultraviolet and infra-red spectra support structural assignments. Norlobaridone (Ia) presents an exception to the acetate theory of biogenesis in the position of its ketonic oxygen atom.
Title: Chemistry of Australian Lichens. II. A New Depsidone from
Parmelia conspersa
(Ehrh.) Ach
Description:
A new compound, norlobaridone, from Parmelia conspersa is shown to have structure Ia by conversion of its monomethyl ether (lobaridone (Ib)) into lobariol (IIb).
The depsidone ring is readily cleaved by basic reagents to give products containing a new cyclic system and including an isomeric ?-enol lactone (IIIa), norlobariol (IIa), and the oxime anhydride (IVa) of the latter.
Ultraviolet and infra-red spectra support structural assignments.
Norlobaridone (Ia) presents an exception to the acetate theory of biogenesis in the position of its ketonic oxygen atom.
Related Results
Chemistry of Australian Lichens. I. Some Constituents of
Parmelia conspersa
(Ehrh.) Ach.,
Ramalina fraxinea
(L.) Ach.,
Usnea barbata
(L
Chemistry of Australian Lichens. I. Some Constituents of
Parmelia conspersa
(Ehrh.) Ach.,
Ramalina fraxinea
(L.) Ach.,
Usnea barbata
(L
Each of the species named in the title has yielded (+)-usnic acid, as found in previous investigations in other parts of the world. Other aromatic constituents isolated, except sal...
Trooping the (School) Colour
Trooping the (School) Colour
Introduction
Throughout the early and mid-twentieth century, cadet training was a feature of many secondary schools and educational establishments across Australia, with countless ...
Experimental studies of lobe growth in the lichen Parmelia conspersa (Ehrh. ex Ach.) Ach.
Experimental studies of lobe growth in the lichen Parmelia conspersa (Ehrh. ex Ach.) Ach.
summaryThe radial growth of individual lobes of the foliose lichen, Parmelia conspersa (Ehrh. ex Ach.) Ach., was studied to determine whether (1) adjacent lobes exchange carbohydra...
HUMAN TENOCYTES ARE STIMULATED TO PROLIFERATE BY ACETYLCHOLINE THROUGH AN EGFR SIGNALLING PATHWAY
HUMAN TENOCYTES ARE STIMULATED TO PROLIFERATE BY ACETYLCHOLINE THROUGH AN EGFR SIGNALLING PATHWAY
IntroductionStudies on human patellar and Achilles tendons have shown that tendon cells not only have the capacity to produce acetylcholine (ACh) but also express muscarinic ACh re...
Reclaiming the Wasteland: Samson and Delilah and the Historical Perception and Construction of Indigenous Knowledges in Australian Cinema
Reclaiming the Wasteland: Samson and Delilah and the Historical Perception and Construction of Indigenous Knowledges in Australian Cinema
It was always based on a teenage love story between the two kids. One is a sniffer and one is not. It was designed for Central Australia because we do write these kids off there. N...
The release of acetylcholine: from a cellular towards a molecular mechanism
The release of acetylcholine: from a cellular towards a molecular mechanism
The isolation of synaptic vesicles rich in acetylcholine (ACh) from the electric organ of Torpedo has indeed strengthened the hypothesis of transmitter exocytosis, but soon after i...
Acetylcholine signaling in the medial prefrontal cortex mediates the ability to learn an active avoidance response following learned helplessness training
Acetylcholine signaling in the medial prefrontal cortex mediates the ability to learn an active avoidance response following learned helplessness training
Abstract
Increased brain levels of acetylcholine (ACh) are observed in subsets of patients with depression and increasing ACh levels chronically can precipitate str...
THE INFLUENCE OF ACH TO ISOLATED GUINEA PIG CARDIAC ATRIUM MYOCYTES IKACH
THE INFLUENCE OF ACH TO ISOLATED GUINEA PIG CARDIAC ATRIUM MYOCYTES IKACH
Objectives
Atrial frillation (AF) is one of the common clinical arrhythmia and its pathogenesis is extremely complex. In recent years, scholars have observed that...