Concise Syntheses of (+)-Macrosphelides A and B: Studies on the Macro-Ring Closure Strategy
摘要：
Highly concise syntheses of (+)-macrosphelides A and B were accomplished in this study. The key feature of our synthetic route involved the direct three-carbon homologation of the readily available Weinreb amide 6 by the addition of a trans-vinylogous ester anion equivalent and facile construction of the 16-membered macrolide skeleton of macrosphelides via an intramolecular nitrile oxide-olefin cycloaddition. The syntheses of macrosphelides A and B were completed with a 30 and 20% overall yield, respectively. This paper describes the details of our syntheses.
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DOI：
10.1002/chin.200921196
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年份：
2009
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