Tetrahedron p. 3611 - 3622 (1986)
Update date:2022-08-03
Topics:
Collado, I. Gonzalez
Macias, F. A.
Massanet, G. M.
Luis, F. Rodriguez
The stereochemistry of clementein (1) (the first oxetane-containing sesquiterpene lactone) is determined to be 16(S) on the basis of chemical and spectroscopic data.Clementeins B (2) and C (3), isolated from the same source (Centaurea clementei D.C.) were shown to be closely related guaianolides, with an 11,13-oxetane ring.A number of chemical transformations on the oxetane in 2 and 3 have been accomplished.
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