期刊
ORGANIC & BIOMOLECULAR CHEMISTRY
卷 10, 期 18, 页码 3689-3695出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ob25151e
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资金
- CSIR, New Delhi [MLP-0010]
The synthesis of the macrolactone core of (+)-neopeltolide has been achieved. The key synthetic strategy involves the highly diastereoselective synthesis of the 2,6-cis-disubstituted tetrahydropyran ring by a transannular cyclization of delta-hydroxy alkene using mercuric trifluoroacetate. Two of the six stereocenters C-5 and C-11 were realized from L-malic acid, while the remaining stereocenters C-3 (Sharpless asymmetric epoxidation), C-7 (transannular cyclization), C-9 (regioselective epoxide opening) and C-13 (chelation controlled reduction) were derived by asymmetric synthesis. The macrolactone ring was synthesized by macrocyclization using a RCM protocol.
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