Chiral aspyrone

Several syntheses of parasorbic acid (7) have been reported (6-15). Osmundalactone (8) has also been isolated from the fungus Paxillus atrotomentosus (16). A synthesis of chiral aspyrone (9) has confirmed its absolute stereochemistry (17) and studies on its biosynthesis have continued (18). 

SuGiYAMA, T., T. Murayama, K. Yamashita, and T. Orttani Synthesis of Chiral Aspyrone, a Multi-functional Dihydropyranone Antibiotic. Biosci. Biotechnol. Biochem., 59, 1921 (1995). 

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See also in sourсe #XX -- [ ]

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