1997 pyran derivatives

pyran derivativesR 0340

25 - 123Optically Active 6-Acetyloxy-2H-pyran-3(6H)-one Obtained byLipase- Catalyzed Transesterification and Esterification. — Enan-tiomerically pure pyranones (I) are obtained via an efficient lipase-catalyzedtransesterification of the racemate or via lipase- catalyzed esterification of thecorresponding hemiacetal (II). The enantioselectivity strongly depends on thelipase used. — (VAN DEN HEUVEL, M.; CUIPER, A. D.; VAN DER DEEN,H.; KELLOGG, R. M.; FERINGA, B. L.; Tetrahedron Lett. 38 (1997) 9,1655-1658; Dep. Org. Mol. Inorg. Chem., Univ. Groningen, NL-9747 AGGroningen, Neth.; EN)

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