Tetrahedron Letters p. 771 - 774 (1982)
Update date:2022-08-23
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Tsankova, Elena
The lactone 5 was found to be a co-product of the BF3 etherate induced cyclization of epoxyisogermacrone 2.The ketol 3 when treated with 100percent HCOOH afforded the lactone 5 while under the same conditions the ketol 4 gave the corresponding ester 6.A mechanism is suggested for the rearrangements.
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