Trifluoromethyl aldimines could react, under Barbier conditions in the presence of activated zinc, in DMF at room temperature or in THF at reflux, with various allyl bromides to provide the corresponding homoallylamines. Secondary homoallyl trifluoromethylamines were stereoselectively obtained from the optically active aldimine 12 with an excellent diastereoisomeric excess (98%).
Aminated compounds bearing at least an allyl and a difluoromethyl and method used for synthesis thereof
申请人:Bonnet-Delpon Daniele
公开号:US20060079719A1
公开(公告)日:2006-04-13
The invention relates to aminated compounds bearing at least an allyl and a difluoromethyl and a method used for synthesis thereof. Said compounds comprise at least one carbon bearing: an amine function, an allyl or propargyl radical, a difluoromethylene group, and a hydrogen or a hydrocarbon radical, advantageously selected among those which are electron donors or hardly electroattractive (; 0. 1). The invention is useful for synthesis of fluorinated compounds.
COMPOSES AMINES PORTEURS D'AU MOINS UN ALLYLE ET D'UN DIFLUOROMETHYLE ET PROCEDE UTILE A LEUR SYNTHESE
申请人:RHODIA CHIMIE
公开号:EP1494994A2
公开(公告)日:2005-01-12
[EN] AMINATED COMPOUNDS BEARING AT LEAST AN ALLYL AND A DIFLUOROMETHYL AND METHOD USED FOR SYNTHESIS THEREOF<br/>[FR] COMPOSES AMINES PORTEURS D'AU MOINS UN ALLYLE ET D'UN DIFLUOROMETHYLE ET PROCEDE UTILE A LEUR SYNTHESE
申请人:RHODIA CHIMIE SA
公开号:WO2003095415A2
公开(公告)日:2003-11-20
La présente invention vise des composés aminés porteurs d'au moins un allyle et d'un difluorométhyleet un procédé utile ô leur synthèse.Ces composés comportent au moins un carbone porteur :- d'une fonction amine ;- d'un radical allylique ou propargylique ;- d'un groupe difluorométhylène ;et- d'un hydrogène ou d'un radical hydrocarboné, avantageusement choisi parmi ceux qui sont donneurs oufaiblement électroattracteurs (sp £ 0,1).Application ô la synthèse de composés fluorés.
Diastereoselective Ti-mediated preparation of bicyclic aminocyclopropanes from N-alkenyl amides
作者:Claire Madelaine、Andrea K. Buzas、Justyna A. Kowalska-Six、Yvan Six、Benoît Crousse
DOI:10.1016/j.tetlet.2009.07.031
日期:2009.9
Intramolecular Ti-mediated alkene-amide couplings of a range of N-alk-3-enyl amides fitted with a substituent at the homoallylic position are described. CF3-substituted compounds are suitable substrates and bicyclic aminocyclopropanes bearing a CF3 group can be prepared in this way. Good diastereoselectivities can be observed depending on the substitution pattern, and best results are obtained in diethyl ether rather than in THF. (C) 2009 Elsevier Ltd. All rights reserved.