Search results for "Antoni"
showing 10 items of 359 documents
Renowacja zabytkowych organów świdnickiej firmy Schlag & Söhne w kościele filialnym pw. Matki Bożej Różańcowej w Szczepanowie (diecezja świdnicka)
2019
Celem niniejszego artykułu jest udokumentowanie przeprowadzonych w 2017 roku prac konserwatorskich przy organach kościoła filialnego w Szczepanowie. Instrument ten został wybudowany w 1882 roku przez fabrykę organową Schlag & Söhne ze Świdnicy i oznaczony jako opus 213 firmy. Organy posiadają dziewięć głosów rozdzielonych na dwa manuały i pedał, mechaniczną trakturę rejestrów i gry oraz wiatrownice z wiszącymi klapami. Remont organów prowadzono od sierpnia do listopada 2017 roku. Jego wykonawcą był zakład organmistrzowski Antoniego Szydłowskiego z Mędłowa. Organom przywrócono pełną sprawność techniczną i brzmieniową. Dokonano pełnej rewaloryzacji wszystkich elementów instrumentu. Zainstalow…
ChemInform Abstract: Synthesis of Elemane Bis-lactones Structurally Related to Vernolepin.
2010
Abstract The chemical transformation of santonin into an elemane bis -lactone structurally related to the antitumour compound vernolepin is reported. The transformation of ring A of santonin into a hemiacetal δ-lactone was achieved in eleven steps. The spectroscopic characteristics of the synthetic product obtained in this way revealed that the proposed structure for the natural product should be revised.
ChemInform Abstract: The Synthesis of Bioactive Sesquiterpenes from Santonin
2010
Abstract This article reviews the literature published in the last decade dealing with the transformation of α-santonin into bioactive or potentially bioactive sesquiterpenes. A number of syntheses starting from 8α-hydroxysantonin (artemisin) have also been included. Special emphasis has been placed on synthesized products that show biological activity. Major advances in this field include the application of new reagents and methodologies for the structural modification of the santonin skeleton and functionality, and its transformation into other sesquiterpenes, especially sesquiterpene lactones. The review has been organised into five parts: 1. Introduction: An overview of the structure an…
ChemInform Abstract: Synthetic Studies Toward Natural Furanosesquiterpenoids from Santonin. Synthesis of (+)-1,2-Dihydrotubipofuran.
2010
Abstract Santonin (1) was converted into (+)-1,2-dihydrotubipofuran (13) via a synthetic pathway involving a very easy preparation of 7,11-ene-8,12-olide and 8,12-furan moieties and A-ring elaboration on the eudesmane framework.
ChemInform Abstract: Synthesis of (+)-Isoalantolactone and (+)-Isoalloalantolactone from (-) -Santonin.
2010
Abstract This paper reports on the chemical conversion of (−)-santonin into (+)-isoalantolactone and (+)-isoalloalantolactone involving functionality transfer from C 6 to C 8 , refunctionalization of the ring A and the formation of the α-methylene-8 β,12-olide moiety.
ChemInform Abstract: Synthesis of Two Natural 8-Oxo-β-cyperone Derivatives from (-)- Santonin.
2010
Abstract This paper reports on the chemical transformations of (−)-santonin into (+)-8-oxo-β-cyperone and (+)-12-hydroxy-8-oxo-β-cyperone involving 8-oxo group introduction and elaboration of the side chain.
ChemInform Abstract: Synthesis of Elemane Bis-lactones from Santonin - Synthesis of the Reported Structure of seco-Isoerivanin Pseudo Acid and Formal…
2001
The synthesis of the reported structure for seco-isoerivanin pseudo acid (1) and of an elemane bis-lactone 5 from santonin (4) through a common vinylic precursor 12 is described. Compound 5 is a known intermediate in a previous synthesis of the antitumor compound (+)-8-deoxyvernolepin (3). The vinyl group of 12 underwent a regio- and diastereoselective anti addition of an external electrophile and an intramolecular condensation to yield either the selenolactone 13 or the hydroxylactone 17. The lactones 13 and 17 served as key intermediates in the total synthesis of 1 and 5 respectively. A revision of the structure of seco-isoerivanin pseudo acid to the C-10 epimer is suggested on the basis …
Ultrasound assisted reductive cleavage of eudesmane and guaiane γ-enonelactones. Synthesis of 1α,7α,10αH-guaian-4,11-dien-3-one and hydrocolorenone f…
2001
Abstract Ultrasound enhances the rate of reductive cleavage of the C6–oxygen bond of sesquiterpene enonelactones. trans-Eudesmanolides 1c–1g, cis-eudesmanolides 2a–2c, and trans-guaianolides 4a–4d react with Zn in acetic acid–H2O under sonochemical conditions to afford the corresponding sesquiterpene acids 3a–3g and 5a–5d, respectively in good yields. Starting from 5d two natural guaianes 1α,7α,10αH-guaian-4,11-dien-3-one (6) and hydrocolorenone (7) have been prepared in good yields through a straightforward sequence.
ChemInform Abstract: Ultrasound-Assisted Reductive Cleavage of Eudesmane and Guaiane γ-Enonelactones. Synthesis of 1α,7α,10αH-Guaian-4,11-dien-3-one …
2010
Abstract Ultrasound enhances the rate of reductive cleavage of the C6–oxygen bond of sesquiterpene enonelactones. trans-Eudesmanolides 1c–1g, cis-eudesmanolides 2a–2c, and trans-guaianolides 4a–4d react with Zn in acetic acid–H2O under sonochemical conditions to afford the corresponding sesquiterpene acids 3a–3g and 5a–5d, respectively in good yields. Starting from 5d two natural guaianes 1α,7α,10αH-guaian-4,11-dien-3-one (6) and hydrocolorenone (7) have been prepared in good yields through a straightforward sequence.
Antonio Pisano y Enrique Giner: dos visiones medallísticas sobre Alfonso V El Magnánimo.
2010
Antonio Pisano, llamado il Pisanello, y Enrique Giner son dos de los más destacados medallistas que ha dado el arte. Además, ambos exploraron la capacidad estilística y simbólica del arte de la medalla trabajando, entre sus muchos encargos, sobre un personaje común de extraordinaria importancia en la historia valenciana: Alfonso el Magnánimo. El primero en pleno Renacimiento, y el segundo durante el pasado siglo XX, supieron reflejar distintos carices del monarca en función de lo que demandaban sus patronos y, sobre todo, su propia época. El presente estudio explora los caminos estéticos e iconográficos que ambos autores tomaron en dicha representación e intenta indagar su trasfondo ideológ…