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Title: Concise syntheses of (+)-macrosphelides A and B. Author: Paek SM, Seo SY, Kim SH, Jung JW, Lee YS, Jung JK, Suh YG. Journal: Org Lett; 2005 Jul 21; 7(15):3159-62. PubMed ID: 16018610. Abstract: [reaction: see text]. Unified and highly convergent total syntheses of (+)-macrosphelides A and B are described. Key features of the syntheses include (1) concise synthesis of the optically active delta-hydroxy-gamma-keto alpha,beta-unsaturated acid fragment via the direct addition of a trans-vinylogous ester anion equivalent to the readily available Weinreb amide and (2) facile construction of the 16-membered macrolide core of the macrosphelide series via an intramolecular nitrile-oxide cycloaddition (INOC).[Abstract] [Full Text] [Related] [New Search]