Enantioselective synthesis of δ-ketobutanolides from (l)-glutamic acid via organomanganese reagents
摘要:
Various optically active delta-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 place in THF under mild conditions (-10 degrees C, 3h or 3% CuCl, -30 degrees C, 20 min.). (C) 1997 Elsevier Science Ltd.
Highly stereoselective preparation of enantiomerically pure 1,2-diols: synthesis of (+)-exobrevicomin
作者:Marc Larchevêque、Julien Lalande
DOI:10.1039/c39850000083
日期:——
Reduction of optically pure acyl-lactones (2) by L-Selectride affords monoprotected syn diols with high diastereoselectivity; the reaction was applied to the stereo- and enantio-specific synthesis of (+)-exobrevicomin.
Larcheveque; Lalande, Bulletin de la Societe Chimique de France, 1987, vol. No. 1, # 1, p. 116 - 122
作者:Larcheveque、Lalande
DOI:——
日期:——
Enantioselective synthesis of δ-ketobutanolides from (l)-glutamic acid via organomanganese reagents
作者:Gérard Cahiez、Eric Métais
DOI:10.1016/s0957-4166(97)00099-2
日期:1997.5
Various optically active delta-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 place in THF under mild conditions (-10 degrees C, 3h or 3% CuCl, -30 degrees C, 20 min.). (C) 1997 Elsevier Science Ltd.