- Synthesis and evaluation of paromomycin derivatives modified at C(4 ')
[作者：Pathak, R; Perez-Fernandez, D; Nandurdikar, R; Kalapala, SK; Bottger, EC; Vasella, A,期刊：Helvetica Chimica Acta, 页码：1533-1552 , 文章类型： Article，,卷期：2008年91-8]
- The 2-amino-2-deoxy-alpha-D-glucopyranosyl moiety (ring 1) of paromomycin was replaced by a 2,4-diamino-2,4-dideoxy-alpha-D-glucopyranosyl, 2,4-diamino-alpha-D-galactopyranosyl, 2-amino-2-deoxy=alpha-D-galacto[yranosyl, ...
- New N-containing sesquiterpenes from Hainan marine sponge Axinyssa sp.
[作者：Li, ZY; Yu, ZG; Guo, YW,期刊：Helvetica Chimica Acta, 页码：1553-1558 , 文章类型： Article，,卷期：2008年91-8]
- Three new N-containing sesquiterpenes, isofarnesyl formamide (2), 7-formamide-7.8-dihydro-alpha-bisabolane (3), 4,5-epi-10-isothiocyanatoisodauc-6-ene (4), and a known sesquiterpene. farnesyl formamide (1). were isolated...
- Kopsine and danuphylline alkaloids from Kopsia. biomimetic partial synthesis of danuphylline B
[作者：Lim, KH; Low, YY; Tan, GH; Kam, TS,期刊：Helvetica Chimica Acta, 页码：1559-1566 , 文章类型： Article，,卷期：2008年91-8]
- Two new indole alkaloids, 12-methoxykopsine (6) and danuphylline B (7). were obtained from the leaf extract of file Malayan Kopsia species, K. arborea, and their structures established by spectroscopic analysis. An elect...
- Synthesis, characterization, thermal decomposition, and kinetic studies of binuclear sulfur-coordinated tungsten(V) complexes with piperidine-1-carbodithioate
[作者：Lozano, R; de Jesus, F; de Santayana, MC; Lozano, MC,期刊：Helvetica Chimica Acta, 页码：1567-1577 , 文章类型： Article，,卷期：2008年91-8]
- We describe the synthesis. characterization by IR and electronic spectra. magnetic susceptibility measurements. analytical data, kinetic study by differential-scanning calorimetry, and thermogravimetric analysis of the t...
- Six new dammarane triterpenoids from Viburnum cylindricum
[作者：Tu, L; Zhao, Y; Yu, ZY; Cong, YW; Xu, G; Peng, LY; Zhang, PT; Cheng, X; Zhao, QS,期刊：Helvetica Chimica Acta, 页码：1578-1587 , 文章类型： Article，,卷期：2008年91-8]
- One new dammarane triterpenoid, cylindrictone A (1). as well as five new nor-dammarane triterpenoids cylindrictone B-F(2-6)were isolated from the leaves of Viburnum cylindrium, together with three known compounds 3 beta-...
- Tricycloalternarenes A-E: Five new mixed terpenoids from the endophytic fungal strain Alternaria alternata Ly83
[作者：Yuan, L; Zhao, PJ; Ma, J; Li, GH; Shen, YM,期刊：Helvetica Chimica Acta, 页码：1588-1594 , 文章类型： Article，,卷期：2008年91-8]
- Five new mixed terpenoids, tricycloalternarenes (TCAs) A-E (1-5). together with two known compounds. TCA 1b (6) and TCA 2b (7). were isolated from the solid-state-cultured endophytic fungus Alternaria alternaria of Mayte...
- Cadinane-type sesquiterpenoids, strobilols E-K, from the liquid culture of Strobilurus ohshimae
[作者：Hiramatsu, F; Murayama, T; Koseki, T; Okada, K; Shiono, Y,期刊：Helvetica Chimica Acta, 页码：1595-1603 , 文章类型： Article，,卷期：2008年91-8]
- New cadinane sequiterpenoids, strobilols E-K (5-11, resp.) have been isolated from a liquid culture of Strobilurus ohshimae. Their structures have been established on the basis of spectral analyses.
- The orthogonal (e,e,e)-tris-adduct of 9,10-dimethylanthracene with C-60-fullerene: A hidden cornerstone of fullerene chemistry
[作者：Duarte-Ruiz, A; Wurst, K; Krautler, B,期刊：Helvetica Chimica Acta, 页码：1401-1408 , 文章类型： Article，,卷期：2008年91-8]
- Tris(9',10'-dimethyl[9,10]ethanoanthracene[11',12':1,9;11",12":16,17;11"',12"':30,31])[5,6]fullerene C-60, the orthogonal (e,e,e)-tris-adduct of C-60 and 9,10-dimethylanthracene, was obtaines from [4+2]-cycloaddition (Di...
- X-ray structure analyses of syn/anti-conformers of N-furfuroyl-, N-benzoyl-, and N-picolinoyl-substituted (2R)-bornane-10,2-sultam derivatives
[作者：Koszewska, K; Piatek, A; Chapuis, C; Jurczak, J,期刊：Helvetica Chimica Acta, 页码：1409-1418 , 文章类型： Article，,卷期：2008年91-8]
- The synthesis and I lie X-ray structure of the three new N-(arylcarbonyl)-substituted derivatives 2a-2c of (2 R)-bornane-10,2-sultam are presented and discussed. Direct comparison of the solid-state analyses shows that t...
- Addition reactions of sulfenyl and sulfinyl chlorides with 3-phenyl-1-azabicyclo[1.1.0]butane
[作者：Mloston, G; Woznicka, M; Drabowicz, J; Linden, A; Heimgartner, H,期刊：Helvetica Chimica Acta, 页码：1419-1429 , 文章类型： Article，,卷期：2008年91-8]
- The reactions of 3-phenyl-1-azabicyclo[1.1.0]butane with alpha-chlorosulfenyl chlorides and sulfinyl chlorides leas to the corresponding sulfenamides and sulfinamides, respectively, which possess an azetidine ring. It is...
- Room-temperature alkyne-nitrile metathesis and unambiguous proof for the existence of a high-valent iron-nitrido dication in the gas phase
[作者：Boyd, JP; Schlangen, M; Grohmann, A; Schwarz, H,期刊：Helvetica Chimica Acta, 页码：1430-1434 , 文章类型： Article，,卷期：2008年91-8]
- An unprecedented alkyne-nitrile metathesis takes place when the high=valent iron-nitrido dication [Fe(L)N](2), with L=2.6-bis(2-methyl-1,3-diaminopropan-2-yl)pyridine, is reacted with alkynes in the gas pahse under therm...
- Ligand-free copper-catalyzed arylation of imidazole and N,N '-carbonyldiimidazole, and microwave-assisted synthesis of N-Aryl-1H-imidazoles
[作者：Yang, XD; Li, L; Zhang, HB,期刊：Helvetica Chimica Acta, 页码：1435-1442 , 文章类型： Article，,卷期：2008年91-8]
- Microwave-assisted arylation of 1H-imidazoles and N,N'-carbonyldiinidazole under ligand-free copper-mediated conditions in tetraethyl orthosilicate is reported. Valuable evidence for understanding of the Cu-catalyzed mec...
- On the adsorption and reduction of the herbicide picloram on mercury and carbon electrodes
[作者：Mellado, JMR; Pintado, S; Montoya, MR,期刊：Helvetica Chimica Acta, 页码：1443-1452 , 文章类型： Article，,卷期：2008年91-8]
- At concentrations higher than 2.10(4) M, and below pH 3, the cyclic voltammograms of picloram (=4-amino-3,5,6-tricholoropyridine-2-carboxylic acid) on Hg electrodes show two prepeak systems (named I and Ii attneding to t...
- Two new cytotoxic nonsulfated pentasaccharide holostane (=20-hydroxylanostan-18-oic acid gamma-lactone) glycosides from the sea cucumber Holothuria grisea
[作者：Sun, GQ; Li, L; Yi, YH; Yuan, WH; Liu, BS; Weng, YY; Zhang, SL; Sun, P; Wang, ZL,期刊：Helvetica Chimica Acta, 页码：1453-1460 , 文章类型： Article，,卷期：2008年91-8]
- Two new lanostanc-tylic nonsulfated pentasaccharide triterpene glycosides. 17-dehydroxyholothur-inoside A (1) and griseaside A (2), were isolated from the sea cucumber Holothuria grisea. Their structures were elucidated ...
- Studies on 4-thiazolidinones: Scope of the reactions of 3-aryl-2-thioxo-1,3-thiazolidin-4-ones with cyanide and cyanate ions
[作者：Omar, MT; Shaban, ME; El-Aasar, NK; Saied, KF,期刊：Helvetica Chimica Acta, 页码：1461-1470 , 文章类型： Article，,卷期：2008年91-8]
- Treatment of 3-aryl-2-thioxo1,3-thiazolidin-4-ones 1 with CN- and NCO- effected the ring clevage providing [(cyanocarbonothioyl)amino]benzene 4 and arylisothiocyanates 5, respectively. Similar treatment of 5-(2-aryl-2-ox...
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