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 , 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: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: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...
作者:... Heinz Stadtmüller , Paul Knochel , Gérard Cahiez
来源:[J].Tetrahedron Letters(IF 2.397), 1997, Vol.38 (11), pp.1927-1930Elsevier
摘要:Abstract(#br)Various functionalized aryl and alkenyl manganese halides have been prepared from the corresponding aryl and alkenylhalides according to a one-pot procedure: lithium-halogen exchange at low temperature then LiMn transmetallation.
作者:... Alfredo Ricci , Gérard Cahiez , Paul Knochel
来源:[J].Tetrahedron(IF 2.803), 2000, Vol.56 (18), pp.2727-2731Elsevier
摘要:Abstract(#br)Highly functionalized arylmagnesium bromides are readily prepared by an iodine–magnesium exchange reaction. In the presence of catalytic amounts of copper(I) salts and chlorotrimethylsilane, they add to various enones leading to the conjugate addition products i...

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