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Asymmetric diels alder reactions and michael type additions with 6(R)-3′(R)-Pantolactone-substituted-2H-pyran-3(6H)-one.

1991; Elsevier BV; Volume: 32; Issue: 50 Linguagem: Inglês

10.1016/0040-4039(91)80136-t

1873-3581

Joop Knol, Johan F. G. A. Jansen, F. VAN BOLHUIS, B.L. Feringa,

Chemical synthesis and alkaloids

The preparation of optically pure pyranone 2a, using d-pantalactone 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.