Silicon tetrachloride in organic synthesis: new applications for the vinylogous aldol reaction
作者:Maria R. Acocella、Margherita De Rosa、Antonio Massa、Laura Palombi、Rosaria Villano、Arrigo Scettri
DOI:10.1016/j.tet.2005.02.020
日期:2005.4
efficient methodology for vinylogousaldol reactions based on SiCl4 catalysis. According to the nucleophilicity Mayr's scale, vinylogousaldol reaction of Chan's diene proved to be effective by using catalytic amount of SiCl4, without any other promoter. On the contrary, the SiCl4/Lewis base system has been conveniently exploited for the efficient and selective vinylogous reaction of less nucleophilic
Study on an Aldol Reaction Catalyzed by Ti(IV)/Calix[n]arene Complexes
作者:Annunziata Soriente、Margherita De Rosa、Marina Fruilo、Laura Lepore、Carmine Gaeta、Placido Neri
DOI:10.1002/adsc.200505023
日期:2005.5
Ti(IV)/calixarene complexes, formed in situ or previously prepared with standard procedures, can be conveniently used as efficient catalysts in the aldol reaction of Chan's silyloxydiene with a range of aldehydes bearing either activating or deactivating groups, including aromatic, heteroaromatic and α,β-unsaturated ones. The structure of both calixarene ligand and aldehyde, as well as the reaction
A new approach to pyranofuranones, advanced intermediates for the synthesis of manoalide, cacospongionolides and their analogues
作者:Annunziata Soriente、Margherita De Rosa、Arrigo Scettri、Guido Sodano
DOI:10.1016/0040-4039(96)01811-4
日期:1996.10
The pyranofuranone fragment, main structural feature of many bioactive sesterterpenes of marin origin, is accessible through a simple and convenient synthetic sequence.
吡喃呋喃酮片段是许多源自海洋的具有生物活性的五酯类酯的主要结构特征,可通过简单便捷的合成顺序获得。
Synthesis and Comparison of the Antiinflammatory Activity of Manoalide and Cacospongionolide B Analogues
作者:Margherita De Rosa、Silvana Giordano、Arrigo Scettri、Guido Sodano、Annunziata Soriente、Pablo García Pastor、Maria J. Alcaraz、Miguel Payá
DOI:10.1021/jm980027h
日期:1998.8.1
compounds were tested for their inhibitory effects on secretory PLA2 belonging to the groups I, II, and III, and the activities were found to be similar in both series, irrespective of the presence or absence of the additional hemiacetal function. In addition, the PLA2 inhibitory activity increases with the increasing hydrophobic character of the side chain linked to the pyranofuranone moiety. The most active
Enantioselective Synthesis of Pyranofuranone Moieties of Manoalide and Cacospongionolide B by Enzymatic and Chemical Approach
作者:Margherita De Rosa、Annunziata Soriente、Guido Sodano、Arrigo Scettri
DOI:10.1016/s0040-4020(00)00122-8
日期:2000.3
Two synthetic sequences leading to the pyranofuranone moieties of Manoalide and Cacospongionolide B in enantiomerically enriched forms are reported. The key steps involve either an enantioselective aldol condensation or an enzymatic resolution.