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.
An efficient asymmetric aldol reaction of Chan's diene promoted by chiral Ti(IV)–BINOL complex
作者:Annunziata Soriente、Margherita De Rosa、Marina Stanzione、Rosaria Villano、Arrigo Scettri
DOI:10.1016/s0957-4166(01)00150-1
日期:2001.4
1.3-Bis-(trimethylsilyloxy)-1-methoxy-buta-1,3-diene (Chan's diene) can be conveniently used in asymmetric aldol reaction with aromatic, heteroaromatic, alpha,beta -unsaturated and aliphatic aldehydes in the presence of catalytic amounts (2-8% mol) of chiral Ti(IV)/(R)-BINOL complex. (C) 2001 Elsevier Science Ltd. All rights reserved.
A new procedure for the enantioselective vinylogous aldol reaction of Chan’s diene
Chiral delta-hydroxy-delta-ketoesters are easily available through the enantio selective vinylogous aldol reaction of Chan's diene promoted by a SiCl4/chiral phosphoramide catalytic system. The procedure is conveniently exploited for a very rapid approach to (+)-kavain, a natural bio-active alpha-pyrone compound. (c) 2007 Elsevier Ltd. All rights reserved.
An easy approach to chiral non-racemic 6-(furan-3-yl)-5,6-dihydro-pyran-2-ones
作者:Annunziata Soriente、Margherita De Rosa、Patrizia Dovinola、Guido Sodano、Arrigo Scettri
DOI:10.1016/s0957-4166(98)00210-9
日期:1998.7
Chiral non-racemic 6-(furan-3-yl)-pyran-2-one derivatives, key-intermediates in the preparation of compactin, manoalide and cacospongionolide subunits, are easily accessible through a rapid and convenient six-step sequence. (C) 1998 Elsevier Science Ltd. All rights reserved.
First enantioselective synthesis of manoalide: application of aldehyde–dioxinone enantioselective condensation
作者:Annunziata Soriente、Margherita De Rosa、Aniello Apicella、Arrigo Scettri、Guido Sodano
DOI:10.1016/s0957-4166(99)00529-7
日期:1999.12
Manoalide, an analgesic and anti-inflammatory sesterterpene, has been stereoselectively synthesized for the first time. The C-4 stereogenic centre has been introduced in an early step by enantioselective aldol condensation using a Ti(OiPr)4/(R)-(+)-binol complex.
Manoalide是一种止痛和消炎性的酯基萜烯,是首次立体选择性地合成的。C-4立体生成中心已通过使用Ti(O i Pr)4 /(R)-(+)-二元醇复合物的对映选择性羟醛缩合在较早的阶段引入。