Wierzejska J, Motogoe SI, Makino Y, Sengoku T, Takahashi M, Yoda H. A new approach toward the total synthesis of (+)-batzellaside B.
Beilstein J Org Chem 2012;
8:1831-8. [PMID:
23209519 PMCID:
PMC3511019 DOI:
10.3762/bjoc.8.210]
[Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2012] [Accepted: 09/24/2012] [Indexed: 11/23/2022] Open
Abstract
A new synthetic approach to (+)-batzellaside B from naturally abundant L-pyroglutamic acid is presented in this article. The key synthetic step involves Sharpless asymmetric dihydroxylation of an olefinic substrate functionalized with an acetoxy group to introduce two chiral centres diastereoselectively into the structure. Heterocyclic hemiaminal 4, which could be converted from the resulting product, was found to provide stereospecific access to enantiomerically enriched allylated intermediate, offering better prospects for the total synthesis of this natural product.
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