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Stereoselective Synthesis of the C9—C19 Lactone-Dipropionate Fragment of Calyculin C.

✍ Scribed by Kaisa Karisalmi; Ari M. P. Koskinen

Publisher: John Wiley and Sons
Year: 2005
Weight: 11 KB
Volume: 36
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.200507225

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## Abstract The mechanism of the double intramolecular hetero‐Michael addition, a key reaction in the planned synthesis of the natural product calyculin C, has been studied by NMR. The cyclization follows Baldwin’s rules and proceeds first through a six‐membered ring closure (6‐__endo__‐__dig__), f