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Minor Coumarins from Calophyllum teysmannii var. inophylloide and Synthesis of Cytotoxic Calanone Derivatives

✍ Scribed by Shu-Geng Cao; Xiao-Hua Wu; Keng-Yeow Sim; Benny H. K. Tan; Jagadese J. Vittal; Joan T. Pereira; Swee-Hock Goh

Publisher: John Wiley and Sons
Year: 1998
Tongue: German
Weight: 784 KB
Volume: 81
Category: Article
ISSN: 0018-019X
DOI: 10.1002/hlca.19980810549

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✦ Synopsis

A chemotaxonomic survey for biologically active compounds from Malaysian Culophyllum species led to the finding of the four new benzoylcoumarins la, 2, 3, and 4a (including the unusual prenylated 6-benzoylcoumarin la), two uncommon coumarins 5 and 6a with a pyran-4-one moiety fused at C(6) and C(7). and compounds 7a, 9, and 10, all isolated from the bark of C. teysmannii var. inophylloidr. Their structures were determined by spectroscopic analysis and chcmical transformations. X-Ray crystal-structure determination of 2 provided information on the conformational preferences of substituents in this class of coumarins. The syntheses of the cytotoxic calanone (7a) and of some related coumarins are described.

') Arbitrary numbering of the isoprenyl moiety. For convenience, all coumarins are numbered similarly; for systematic names, sec Exprr. Purr.

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ChemInform Abstract: Minor Coumarins fro

ChemInform Abstract: Minor Coumarins from Calophyllum teysmannii var. inophylloide and Synthesis of Cytotoxic Calanone Derivatives.

✍ S. G. CAO; X.-H. WU; K.-Y. SIM; B. H. K. TAN; J. J. VITTAL; J. T. PEREIRA; S.-H. 📂 Article 📅 2010 🏛 John Wiley and Sons ⚖ 31 KB 👁 1 views

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