共查询到20条相似文献,搜索用时 15 毫秒
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All four isomers of substituted 3-alkylthio-4-hydroxybutenes have been synthesised: both the geometry of the double bond and the relative stereochemistry of the two chiral centres are controlled. 相似文献
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A new toxic metabolite was isolated from and the structure was determined by X-ray diffraction analysis. The metabolite was designated as paraherquamide. 相似文献
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Vincenzo Amico Francesca Cunsolo Mario Piattelli Giuseppe Ruberto Frank R. Fronczek 《Tetrahedron》1984,40(10):1721-1725
The isolation of a new metabolite of mixed biogenesis, balearone from the brown alga is described. The structure was determined by an X-ray diffraction analysis. 相似文献
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N-Acyl derivatives of ,-acosamine and ,-ristosamine were synthesized with high stereo selectivity utilizing intramolecular Michael addition of γ- and δ-carbomoyloxy-α,β-unsaturated esters. 相似文献
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J Leitich 《Tetrahedron letters》1980,21(32):3025-3028
The relative rates of formation of and [2+2]cycloadducts of benzyne to , - and , -1,5-cyclooctadiene, - and -cyclooctene are discussed and properties of the adducts (e.g., their unusual hydrogenation) are described. 相似文献
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Junichi Sekiguchi Hironori Kuroda Yasuhiro Yamada Hirosuke Okada 《Tetrahedron letters》1985,26(19):2341-2342
A new macrolide named patulolide A was isolated from the culture broth of mutants. The structure and absolute configuration of it was determined. 相似文献
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Rex T. Gallagher Terrence McCabe Ken Hirotsu Jon Clardy Judith Nicholson Benjamin J. Wilson 《Tetrahedron letters》1980,21(3):243-246
The structure of aflavanine, a new diterpene indole from . , is presented. 相似文献
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Charles D. Hufford Babajide Oguntimein Michael Martin Jon Clardy 《Tetrahedron letters》1984,25(4):371-374
The isolation and structure determination of syncarpurea (1), a novel urea from is reported. 相似文献
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1,3,7,9,11,12,14-Heptazapentacene-2,4,8,10 (14,3,9,12)-tetraones (mixed flavins) were prepared by the cyclization of 1,5-dihydro-8-[N-alkyl-N-(5-nitrouracil-6-yl)-amino-5-deazaflavins with Vilsmeier reagent. The mixed flavins oxidized alcohol under neutral condition in sunlight and a remarkable autorecycling was observed. 相似文献
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