Tetrahedron p. 3349 - 3354 (1988)
Update date:2022-08-05
Topics:
Pettit, G. R.
Singh, S. B.
Goswami, A.
Nieman, R. A.
The oxacanthin alkaloid components of Quassia kerstingii L. have been found to be 2-hydroxy- and 11-hydroxy-canthin-6-one (1a and 1b).Structure 1a was confirmed by results of methylation (1a->1c + 2a) and NOE studies.A selective INEPT NMR technique was employed to support unequivocally the 11-hydroxy-canthin-6-one (1b) assignment.
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