Catalytic, enantioselective, inverse electron-demand diels-alder (IEDDA) reactions of 3-carbomethoxy-2-pyrone (3-CMP)
摘要:
Cycloaddition reactions between 5-CMP 1 and various vinyl ethers and vinyl sulphides, catalysed by the Yb(OTf)(3)-Binol complex, afford bicyclic lactones 3 in moderate to excellent enantiomeric excesses.
Catalytic asymmetric Diels-Alder reactions of 2-pyrone derivatives
作者:István E Markó、Graham R Evans、Jean-Paul Declercq
DOI:10.1016/s0040-4020(01)89387-x
日期:1994.4
Cycloaddition reactions between the chiral 2-pyrone derivatives 9 and various dienophiles, catalysed by lanthanide shift reagents, afforded diastereomerically pure bicyclic lactones 3. A catalyticasymmetric version of these reactions, using optically active lanthanide catalysts, was successfully investigated.
Marko, Istvan E.; Evans, Graham R.; Declercq, Jean-Paul, Bulletin des Societes Chimiques Belges, 1994, vol. 103, # 5-6, p. 295 - 298
作者:Marko, Istvan E.、Evans, Graham R.、Declercq, Jean-Paul、Feneau-Dupont, Janine、Tinant, Bernard
DOI:——
日期:——
Marko Istvan E., Evans Graham R., Declercq Jean-Paul, Tetrahedron, 50 (1994) N 15, S 4557-4574
作者:Marko Istvan E., Evans Graham R., Declercq Jean-Paul
DOI:——
日期:——
Catalytic, enantioselective, inverse electron-demand diels-alder (IEDDA) reactions of 3-carbomethoxy-2-pyrone (3-CMP)
作者:István E Markó、Graham R Evans
DOI:10.1016/s0040-4039(00)77029-8
日期:1994.4
Cycloaddition reactions between 5-CMP 1 and various vinyl ethers and vinyl sulphides, catalysed by the Yb(OTf)(3)-Binol complex, afford bicyclic lactones 3 in moderate to excellent enantiomeric excesses.
Remarkable effect of basic ligands in the lanthanide-catalysed enantioselective cycloadditions of 3-carbomethoxy-2-pyrone (3-CMP)
作者:István E Markó、Isabelle Chellé-Regnaut、Bernard Leroy、Stuart L. Warriner
DOI:10.1016/s0040-4039(97)00876-9
日期:1997.6
The key-role of basic ligands in attaining high enantiomeric excess in the lanthanide catalysed asymmetric cycloadditions of 3-CMP is reported, A model, rationalising all our previous observations is discussed. (C) 1997 Elsevier Science Ltd.