Pilar Arteaga

Chemical composition of the essential oils of leaves and wood of Tetraclinis articulata (Vahl) masters

Abstract The essential oils from leaves and wood of Tetraclinis articulata (Vahl) Masters from Morocco were analyzed by GC and GC/MS. The main constituents of the leaves were bornyl acetate (16.5%), camphor (19.1%) and borneol (9.6%), while cedrol (28.2%) and 1,7-di-epi-cedrol (17.9%) were the major components found in the wood.

Chemical Composition of the Essential Oil from Drimys winteri Forst. Wood

Abstract GC/MS analysis of the essential oil from the wood of Drimys winteri Forst. allowed the identification of 56 components and showed a high content of α-pinene (14.9%) and α-cubebene (10.9%).

Communic Acids: Occurrence, Properties and Use as Chirons for the Synthesis of Bioactive Compounds

Communic acids are diterpenes with labdane skeletons found in many plant species, mainly conifers, predominating in the genus Juniperus (fam. Cupresaceae). In this review we briefly describe their distribution and different biological activities (anti- bacterial, antitumoral, hypolipidemic, relaxing smooth muscle, etc.). This paper also includes a detailed explanation of their use as chiral building blocks for the synthesis of bioactive natural products. Among other uses, communic acids have proven useful as chirons for the synthesis of quassinoids (formal), abietane antioxidants, ambrox and other perfume fixatives, podolactone herbicides, etc., featuring shorter and more efficient processes.

Chemical Composition of the Essential Oil from the Leaves of Juniperus phoenicea L. from North Africa

Abstract The chemical study of the essential oil extracted from leaves of Juniperus phoenicea growing in Morocco has been carried out. The main components of J. phoenicea oil were the monoterpene hydrocarbons α-pinene (45.5%) and ω-3-carene (13.0%). Our results show a number of differences in composition with respect to a previous study of the leaf oils of J. phoenicea (Greece and Spain).

Sesquiterpenes and phenylpropanoids fromSeseli vayredanum

Abstract 10-Hydroxy-α-humulene,10-angeloyloxy-α-humulene and 2-epilaserine have been isolated from Seseli vayredanum . The structure and stereochemistry of these new natural products were established by spectroscopic methods and chemical transformations. In addition, 12 sesquiterpene hydrocarbons, 8α-angeloyloxy-bicyclogermacrene, 3,6-epidioxy-bisabol-1,10-diene, caryophyllene oxide, 10β-acetoxy-8α-angeloyloxyslov-3-en-6,12-olide and the phenylpropanoids myristicine, eugenol methyl ether, elemicin, latifolone, laserine have also been identified.

Sesquiterpene lactones and other constituents of Seseli vayredanum

Abstract Twelve sesquiterpenes, seven phenylpropanoids, two sterols, one triterpene, one diterpene and one polyacetylenic compound were identified from the most polar fractions of the hexane extract of the aerial parts of Seseli vayredanum. Twelve of them are new natural products: lβ-senecioyloxy-5βH,6αH,7αH,1OαMe,11αH-eudesm-3-en- 6,12-olide, 1β-senecioyloxy-5βH,6αH,7aH,1OαMe,11αH-eudesma-2,4(15)-dien-6,12-olide, 2α-angeloyloxy-5β- hydroxy-7αH,10βMe-eudesm-3-en-1-one, 8α-angeloyloxy-10β-hydroxy-slov-3-en-6,12-olide, 10β-hydroxy-8α-senecioyloxy-slov-3-en-6,12-olide, 2-oxo-8α-senecioyloxy-5β,6αH-guai-1(10),3,7(11)-trien-6,12-olide, 8β-angeloyloxy-2-oxo- 5βH,6αH-guai-1(10),3,7(11)-trien-6,12-olide, 2-oxo-8β-senecioyloxy-5βH,6αH-guai-1(10),3,7(11)-trien-6,12-olide, 10β- acetoxy-got-angeloyloxy-3β-hydroxy-lβH,6αH,7αH,11αH- guai-4-en-6,12-olide, erythro- l -hydroxy-2-angeloyloxy-3′,4′- methylenedioxy-5′-methoxy-l-phenylpropane, threo-1-hydroxy-2-angeloyloxy-3′,4′-methylenedioxy-5′- methoxy-l- phenylpropane and 1-hydroxy-3′,4′-methylenedioxy-2′,5′-dimethoxy-1- phenylpropane. Their structures were established by spectroscopic methods and chemical correlations.

Chemical Composition of the Essential Oils of Cupressus atlantica Gaussen

Abstract The chemical composition of essential oils obtained by hydrodistillation of the wood, leaves and cones of Cupressus atlantica Gaussen (Cupressaceae) was studied by GC and GC/MS. Oxygenated sesquiterpenes constituted the main chemical groups in the oil from wood, with cedrol (45.1%) as the major component. The oil from leaves contained higher amounts of sesquiterpenes with germacrene D (13.1%) and α-muurolol (15.9%) as the major components, while the monoterpene hydrocarbon α-pinene (58.7%) was found to predominate in the oil from cones.

(3S,6R)-3,6-dihydroxy-10-methylundecanoic acid and a trimeric diester derivative from Lafuentea rotundifolia

Abstract Two new carboxylic acids, 1 and 6 , have been isolated from the aerial parts of Lafuentea rotundifolia Lag. (Scrophulariaceae). The structural determination was performed by spectroscopic methods and chemical correlations, the absolute stereochemistry being established by Moshers method. Both substances have a fatty acid-type structure with an unusual pattern.