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- W2949964694 abstract "Abstract (+)- and (−)-T-8, (+)- and (−)-9-epi-T-8, and their ethyl homologues were synthesized in six steps and 27% overall yield from chiral acetylenic sulfoxide (+)-7a or (+)-7b, via a cycloaddition reaction with 3,4,5,6-tetrahydropyridine-1-oxide, and chromatographic separation of the resulting diastereoisomeric Δ 4 -isoxazolines. Comparison of the spectral properties of the synthetic (+)-9-epi-T-8 with those of natural (+)-T-7 and (+)-T-3 led us to correct the structures of the latter two compounds. The absolute configuration of (+)-T-4 was determined to be 5R,9S,11R, and those of (+)-T-7 and (+)-T-3 to be 5R,9R,11R by comparison of their CD curves with those of the synthetic compounds." @default.
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- W2949964694 date "2010-08-17" @default.
- W2949964694 modified "2023-09-26" @default.
- W2949964694 title "ChemInform Abstract: Concise Asymmetric Syntheses of (+)- and (-)-Tetraponerine-8, (+)- and (-)-Tetraponerine-7, and Their Ethyl Homologues. A Correction of the Structures of Tetraponerine-3, and -7." @default.
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- W2949964694 doi "https://doi.org/10.1002/chin.199528244" @default.
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