Journal of the Chemical Society. Chemical communications p. 2145 - 2146 (1994)
Update date:2022-08-05
Topics:
Bush
Jones
Nongrum
The 2-benzopyran-3-ones 7a and 7c undergo intramolecular Diels-Alder addition via preferred endo-addition of the connecting chain, whereas for 7d and 7e (X = SO2Ph), exo-addition of the chain is preferred; the main adducts from the latter additions (9d and 9e), give the diterpene-related products 12 (R = H, Y = OMe) and 12 (R = Me, Y = OMe) upon treatment with sodium amalgam.
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(1994)
