SmI2-promoted intra- and intermolecular C–C bond formation with chiral N-acyl oxazolidinones
作者:Rolf H. Taaning、Laura Thim、Jacob Karaffa、Araceli G. Campaña、Anna-Mette Hansen、Troels Skrydstrup
DOI:10.1016/j.tet.2008.09.044
日期:2008.12
The suitability of chiral oxazolidinones in the SmI2-mediated C–C bond generation between the imide functionality of an N-acyloxazolidinone unit and an olefinic radical acceptor, in both inter- and intramolecular reactions, was investigated. It was shown that the products from an Evans asymmetric alkylation can undergo direct carbon–carbon bond formation with an acrylamide providing chiral acyclic
Conjugate addition of allylsilanes to α,β-unsaturated N-acyloxazolidinones
作者:Ming-Jung Wu、Jiann-Yih Yeh
DOI:10.1016/s0040-4020(01)80818-8
日期:1994.1
The conjugate addition of allyltrimethylsilane to alpha,beta-unsaturated N-acyloxazolidinone at -78 degrees C in the presence of TiCl4 gave the allylation product 3. However, when the reaction was carded out at room temperature, a small amount of cyclopentane adduct 4 was observed. The cyclopentane product formation can be prevented by employing BF3.OEt(2) as a Lewis acid. The enantioselective synthesis of optically pure 3-substituted-5-hexenoic acids was achieved by employing chiral oxazolidinone as a chiral auxiliary.
INHIBITEURS DE L'ANGIOGENESE
申请人:Galderma Research & Development, S.N.C.
公开号:EP1480964A1
公开(公告)日:2004-12-01
[EN] ANGIOGENESIS INHIBITORS<br/>[FR] INHIBITEURS DE L'ANGIOGENESE
申请人:GALDERMA RES & DEV
公开号:WO2003040119A1
公开(公告)日:2003-05-15
L'invention se rapporte à de nouveaux dérivés du 1-oxa-spiro [2, 5] octan-6-0l de formule générale (1): ainsi qu'à leur méthode de préparation, et leur utilisation dans des compositions pharmaceutiques destinées à un usage en médicine humaine ou vétérinaire, ou dans des compositions cosmétiques.