Recent Advances in the Field of Naturally Occurring 5,6-Dihydropyran-2-ones

Recent Advances in the Field of Naturally Occurring 5,6-Dihydropyran-2-ones 

The wide variation in the structural features of naturally occurring dihydropyra-nones prevents a general, unified classification of the syntheses of the members of this compound class. Accordingly, we will focus first on the methods reported in the literature for the creation of the 5,6-dihydropyran-2-one core. Methods already 

1) Characteristic examples of such natural molecules are the steroid-like withanolides and the terpenoid dihydropyrones isolated from Kadsura, Ganoderma, and other various species. 

Natural Lactones and Lactams Synthesis, Occurrence and Biolo al Activity, First Edition. 

Formation of 5.6-dihydropyran-2-ones via lactonization of a 5-hydroxy acid 

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I 2 Recent Advances in the Field of Naturally Occurring 5,6-Dihydropyran-2-ones 23.2.7 Asymmetric Cycloadditions... 

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