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1. |
14,15,16-Trinorlabda-8(17),11-(E)-dien-13-al: A Trinorlabdane Diterpene from the Rhizome ofHedychium coronarium |
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Natural Product Letters,
Volume 3,
Issue 3,
1993,
Page 163-166
Sumitra Singh,
AlexanderI Gray,
PeterG. Waterman,
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摘要:
The rhizomes ofHedychium coronarium(Zingiberaceae) have yielded two new diterpenes which have been identified by spectroscopic methods, notably long-range heteronuclear coupling (HMBC). Coronarin-D methyl ether is a labdane diterpene typical of those previously isolated from this species. The second compound, identified as 14,15,16-trinorlabda-8(17),11-(E)-dien-13-al, appears to be an unusual trinorditerpene catabolite which could be formed by degradation of the normal labdanes produced by this species.
ISSN:1057-5634
DOI:10.1080/10575639308043856
出版商:Taylor & Francis Group
年代:1993
数据来源: Taylor
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2. |
Edwardsolides A, B and C. New Sesquiterpenoid Lactones from the Mediterranean OctocoralMaasella edwardsi |
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Natural Product Letters,
Volume 3,
Issue 3,
1993,
Page 167-171
Giuseppe Bifulco,
Ines Bruno,
LuigiGomez Paloma,
Raffaele Riccio,
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摘要:
Three new sesquiterpenoid lactones (1-3) of the germacrane and elemane classes have been isolated from the Mediterranean octocoralMaasella edwardsi. The structure determinations were accomplished by spectroscopic analysis and supported by molecular mechanics and dynamics calculations.
ISSN:1057-5634
DOI:10.1080/10575639308043857
出版商:Taylor & Francis Group
年代:1993
数据来源: Taylor
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3. |
Synthesis of Fregenedadiol Dimethyl Ether |
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Natural Product Letters,
Volume 3,
Issue 3,
1993,
Page 173-176
J.G. Urones,
I.S. Marcos,
P. Basabe,
N.M. Garrido,
A. Jorge,
R.F. Moro,
A.M. Lithgow,
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摘要:
The dienone (3β,15-dimethoxy-5,8-labdadien-7-one), obtained from 7-labdadien-3β,15-diol, is transformed into a phenol by aromatization of ring B. By a cross-coupling reaction catalyzed by Pd(0) the phenol triflate affords fregenedadiol dimethyl ether.
ISSN:1057-5634
DOI:10.1080/10575639308043858
出版商:Taylor & Francis Group
年代:1993
数据来源: Taylor
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4. |
Structure and Synthesis of Phenaglydon, a new Quinolone Derived Phenanthridine Alkaloid fromGlycosmis cyanocarpa |
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Natural Product Letters,
Volume 3,
Issue 3,
1993,
Page 177-182
Gerald Wurz,
Otmar Hofer,
Harald Greger,
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摘要:
A novel quinolone derived alkaloid of the phenanthridine type, phenaglydon (2), has been isolated from the lipophilic leaf extract ofGlycosmis cyanocarpa(Rutaceae) together with schinifoline (1), a prenylated 2-quinolinone characterized by a diene grouping in the side chain. Both structures have been elucidated on spectroscopic evidence. In the case of phenaglydon the proposed structure has additionally been confirmed by synthesis. The co-occurrence of these alkaloids suggests close biogenetic connections between the two compounds.
ISSN:1057-5634
DOI:10.1080/10575639308043859
出版商:Taylor & Francis Group
年代:1993
数据来源: Taylor
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5. |
Synthesis of Vinca Alkaloids and Related Compounds LXVI1Silver Ion-Promoted Rearrangement of the Isoquinuclidine Derivatives During the Synthesis of Deethylcatharanthine |
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Natural Product Letters,
Volume 3,
Issue 3,
1993,
Page 183-188
Hedvig Bölcskei,
Eszter Gács-Baitz,
Csaba Szántay,
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摘要:
In the course of synthesizing deethylcatharanthine (lc), treatment of the indolyl-acetyl derivative (4c) with AgBF4resulted in interesting rearranged products (7), (8) and (9).
ISSN:1057-5634
DOI:10.1080/10575639308043860
出版商:Taylor & Francis Group
年代:1993
数据来源: Taylor
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6. |
The Stereochemistry of Variabilin, an Antimicrobial Sesterterpene Isolated from Marine Sponges |
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Natural Product Letters,
Volume 3,
Issue 3,
1993,
Page 189-192
Masami Ishibashi,
Mitsuru Kurosaki,
Yuzuru Mikami,
Jun'ichi Kobayashi,
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摘要:
Variabilin (1), an antimicrobial furanosesterterpene, has been isolated from an Okinawan marine spongeAmphidmedonsp. and its absolute stereochemistry at the C-18 position was determined asSby synthesis of a degradation product of1.
ISSN:1057-5634
DOI:10.1080/10575639308043861
出版商:Taylor & Francis Group
年代:1993
数据来源: Taylor
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7. |
The Isolation of Ergosta-4, 6, 8 (14), 22-tetraen-3β-ol from Injured Fruit Bodies ofMarasmius oreades |
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Natural Product Letters,
Volume 3,
Issue 3,
1993,
Page 193-196
Zijie Pang,
Olov Sterner,
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摘要:
The steroid ergosta-4, 6, 8 (14), 22-tetraen-3β-ol is formed, presumably enzymatically from ergosterol, in injured specimens of the edible mushroomMarasmius oreades.
ISSN:1057-5634
DOI:10.1080/10575639308043862
出版商:Taylor & Francis Group
年代:1993
数据来源: Taylor
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8. |
Isolation and Structure Characterization of Two Novel Bioactive Sulphated Polyhydroxysteroids from the Antarctic OphiuroidOphioderma longicaudum |
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Natural Product Letters,
Volume 3,
Issue 3,
1993,
Page 197-201
MariaValeria D'auria,
LuigiGomez Paloma,
Luigi Minale,
Raffaele Riccio,
Angela Zampella,
Mariella Morbidoni,
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摘要:
Two novel sulphated polyhydroxysteroids,1, possessing potent cytotoxic activity, and2, which proved to be cytoprotective against HIV-1, have been isolated from the Antarctic ophiuroidOphiosparte gigas, together with the known tetrol disulphated3. The structures of1and2have been determined to be cholest-5-ene-2α,3α,4β, 21-tetraol 3, 21-disulphate and cholest-5-ene-2β,3α, 21-triol 2, 21-disulphate, respectively.
ISSN:1057-5634
DOI:10.1080/10575639308043863
出版商:Taylor & Francis Group
年代:1993
数据来源: Taylor
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9. |
Structures of Three Germacranolide Sesquiterpene Dilactones fromNeolitsea aciculataKoid |
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Natural Product Letters,
Volume 3,
Issue 3,
1993,
Page 203-208
Daisuke Takaoka,
Hiroyuki Tani,
Hiroshi Nozaki,
Mitsuru Nakayama,
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摘要:
In addition to neoliacine and neoliacinic acid previously reported, three new germacranolides, named neoliacinolide A, B, and C, were isolated from the leaves ofNeolitsea aciculataKoidz., and their structures were elucidated by spectroscopic analysis.
ISSN:1057-5634
DOI:10.1080/10575639308043864
出版商:Taylor & Francis Group
年代:1993
数据来源: Taylor
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10. |
Isolation of Two Adjuncts from the Fruits ofAmmi MajusL |
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Natural Product Letters,
Volume 3,
Issue 3,
1993,
Page 209-212
M. HaniA. Elgamal,
NagwaM. M. Shalaby,
Helmut Duddeck,
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摘要:
Two novel natural products, both glucosides with unusual aglycones, have been isolated from the fruits ofAmmi majusL. Their structures were elucidated by 1D and 2D NMR techniques and other spectroscopic evidences.
ISSN:1057-5634
DOI:10.1080/10575639308043865
出版商:Taylor & Francis Group
年代:1993
数据来源: Taylor
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