Asymmetric diels alder reactions and michael type additions with 6(R)-3′(R)-Pantolactone-substituted-2H-pyran-3(6H)-one.
作者:Joop Knol、Johan F.G.A. Jansen、Fré van Bolhuis、Ben L. Feringa
DOI:10.1016/0040-4039(91)80136-t
日期:1991.12
The preparation of optically pure pyranone 2a, using d-pantolactone as a chiral auxiliairy, and its successful application in Diels Alder and Michael type additions with d.r.'s of 89/11 up to 100/0 is described.