The first example of Ir-catalyzed asymmetric substitution reaction with vinyl trifluoroborates is described. The direct reaction between branched, racemic allylic alcohols and potassium alkenyltrifluoroborates proceeded with high site selectivity and excellent enantioselectivity (up to 99%) mediated by an Ir-(P,olefin) complex. This method allows rapid access to various 1,4-dienes or trienes including the biologically active natural products (-)-nyasol and (-)-hinokiresinol.
Composition Comprising the Extract of Anemarrhena Asphodeloides Bunge or the Compounds Isolated from the Same for Preventing and Treating Lipid Metabolism Disorder
申请人:Seo Eun Kyoung
公开号:US20120070515A1
公开(公告)日:2012-03-22
The present invention relates to a composition comprising an extract of
Anemarrhena asphodeloides
Bunge or the compounds isolated from the same, as an active ingredient. In particular, the extract and compounds have the excellent inhibitory effects on adipocyte differentiation, and thus can be used in a pharmaceutical composition and functional food for the prevention and treatment of lipid metabolism disorders.
[EN] COMPOSITION COMPRISING THE EXTRACT OF ANEMARRHENA ASPHODELOIDES BUNGE OR THE COMPOUNDS ISOLATED FROM THE SAME FOR PREVENTING AND TREATING LIPID METABOLISM DISORDER<br/>[FR] COMPOSITION COMPRENANT UN EXTRAIT D'ANEMARRHENA ASPHODELOIDES BUNGE OU LES COMPOSÉS ISOLÉS À PARTIR DE CELLE-CI POUR PRÉVENIR ET TRAITER LES TROUBLES DU MÉTABOLISME LIPIDIQUE
申请人:UNIV EWHA IND COLLABORATION
公开号:WO2010120029A1
公开(公告)日:2010-10-21
The present invention relates to a composition comprising an extract of Anemarrhena asphodeloides Bunge or the compounds isolated from the same, as an active ingredient. In particular, the extract and compounds have the excellent inhibitory effects on adipocyte differentiation, and thus can be used in a pharmaceutical composition and functional food for the prevention and treatment of lipid metabolism disorders.
Stereoisomerically Pure Trisubstituted Vinylaluminum Reagents and their Utility in Copper‐Catalyzed Enantioselective Synthesis of 1,4‐Dienes Containing
<i>Z</i>
or
<i>E</i>
Alkenes
作者:Katsuhiro Akiyama、Fang Gao、Amir H. Hoveyda
DOI:10.1002/anie.200905223
日期:2010.1.8
The desired isomer of a chiral 1,4‐diene containing an E or Z double bond can be accessed readily by a regio‐ and stereoselective hydroalumination of silyl‐substituted alkynes and subsequent enantioselective copper‐catalyzed allylic alkylation. The utility of the procedure was demonstrated through the synthesis of (−)‐nyasol (see scheme). dibal‐H=diisobutylaluminum hydride, NHC=N‐heterocyclic carbene
作者:James Y. Hamilton、David Sarlah、Erick M. Carreira
DOI:10.1021/ja311422z
日期:2013.1.23
The first example of Ir-catalyzed asymmetric substitution reaction with vinyl trifluoroborates is described. The direct reaction between branched, racemic allylic alcohols and potassium alkenyltrifluoroborates proceeded with high site selectivity and excellent enantioselectivity (up to 99%) mediated by an Ir-(P,olefin) complex. This method allows rapid access to various 1,4-dienes or trienes including the biologically active natural products (-)-nyasol and (-)-hinokiresinol.