全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:Gérard Cahiez , Eric Métais
来源:[J].Tetrahedron: Asymmetry(IF 2.115), 1997, Vol.8 (9), pp.1373-1376Elsevier
摘要:Abstract(#br)Various optically active δ-ketobutanolides were easily prepared in good yields, with an excellent enantiomeric purity, by acylation of organomanganese reagents with the butyrolactone acid chloride 3 prepared from natural ( l )-glutamic acid. The reaction takes p...
作者:Gérard Cahiez , Christophe Chaboche , Michelle Jézéquel
来源:[J].Tetrahedron(IF 2.803), 2000, Vol.56 (18), pp.2733-2737Elsevier
摘要:Abstract(#br)The presence of NMP (4–9 equiv.) clearly improves the yield and the chemoselectivity of the Cu-catalyzed alkylation of organomagnesium reagents. Thus, secondary and tertiary alkylmagnesium chlorides were used successfully for the first time in such a reaction an...
作者:Gérard Cahiez , Hovsep Avedissian
来源:[J].Tetrahedron Letters(IF 2.397), 1998, Vol.39 (34), pp.6159-6162Elsevier
摘要:Abstract(#br)Alkenyl iodides, bromides and chlorides react with organomagnesium reagents in THF, in the presence of Co(acac) 2 and NMP (9 to 4 equiv.), to give the cross-coupling products in good yields. The reaction is chemoselective (aryl or alkyl bromides, esters and keto...
作者:Gérard Cahiez , Sophie Marquais
来源:[J].Tetrahedron Letters(IF 2.397), 1996, Vol.37 (11), pp.1773-1776Elsevier
摘要:Abstract(#br)Organomanganese chlorides react with alkenyl iodides, bromides and chlorides in the presence of 3% Fe(acac) 3 . The reaction takes place under very mild conditions (THF-NMP, rt, 1h) to afford the substituted olefin in excellent yields with a high stereo- and chemosel...
作者:Gérard Cahiez , Eric Metais
来源:[J].Tetrahedron Letters(IF 2.397), 1995, Vol.36 (36), pp.6449-6452Elsevier
摘要:Abstract(#br)Various chiral α-acyloxy ketones have been easily prepared, in high yields with an excellent enantiomeric purity, by acylation of organomanganese reagents with the corresponding α-acyloxy carboxylic acid chlorides prepared from α-hydroxy and α-amino acids.
作者:Gérard Cahiez , Lynah Razafintsalama ...
来源:[J].Tetrahedron Letters(IF 2.397), 1998, Vol.39 (8), pp.849-852Elsevier
摘要:Abstract(#br)The reactivity and the stability of organomanganese reagents prepared from the ate complexes MnX 2 ·2LiBr (X= Br,I) and MnCl 2 ·R 4 NX (X= Br, Cl) were studied. The preparation and the use for synthetic applications of stable sec - and tert -alkylmanganese bromi...
作者:Gérard Cahiez , Arnaud Martin , Thomas Delacroix
来源:[J].Tetrahedron Letters(IF 2.397), 1999, Vol.40 (35), pp.6407-6410Elsevier
摘要:Abstract(#br)A new method to obtain activated manganese metal, especially attractive for large scale preparative organic chemistry, is described. The key point is the use of 2-phenylpyridine as electron carrier to reduce manganese chloride by lithium. The active manganese thus ob...
作者:Eric Riguet , Mouâd Alami , Gérard Cahiez
来源:[J].Tetrahedron Letters(IF 2.397), 1997, Vol.38 (25), pp.4397-4400Elsevier
摘要:Abstract(#br)Various functionalized unsymmetrical biaryls can be prepared in good to excellent isolated yields by palladium-catalyzed coupling reaction of aryl manganese chloride with aryl iodides, bromides or triflates. The reaction takes place rapidly and cleanly under mild con...

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