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Absolute stereostructure of callystatin A, a potent cytotoxic polyketide from the marine sponge, Callyspongia truncata

✍ Scribed by Nobutoshi Murakami; Weiqi Wang; Masashi Aoki; Yasuhiro Tsutsui; Kouichi Higuchi; Shunji Aoki; Motomasa Kobayashi

Publisher: Elsevier Science
Year: 1997
Tongue: French
Weight: 223 KB
Volume: 38
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(97)01194-5

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✦ Synopsis

The unidentified configurations at C 5 and C10 in callystatin A (1), a potent cytotoxic polyketide from the marine sponge Callyspongia truncata, were determined to be R, R by comparing the circular dichroism spectrum of 1 with those of two model compounds 2 and 3. Compounds 2 and 3 were synthesized by using E-selective Winig olefination at the C6-C 7 position as a key reaction.

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