Remarkable effect of basic ligands in the lanthanide-catalysed enantioselective cycloadditions of 3-carbomethoxy-2-pyrone (3-CMP)
摘要:
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.
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.
Tinant, B.; Feneau-Dupont, J.; Declerq, J. P., Bulletin des Societes Chimiques Belges, 1997, vol. 106, # 3, p. 169 - 170
作者:Tinant, B.、Feneau-Dupont, J.、Declerq, J. P.、Evans, R. G.、Marko, I. E.