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文章名     作者     期刊名     摘要     卷     期         如果没有找到您所需要的文献，请点击 ——此处申请     共18条记录   Towards the Synthesis of 1-Deoxy-1-nitropiperidinoses [作者：Collin, MP; Vasella, A,期刊：Helvetica Chimica Acta, 页码：2297-2317 , 文章类型： Article，,卷期：2010年93-12] In the course of the first of several attempts to elaborate methods for the synthesis of 1-nitropiperidinoses, lincosamine was transformed into lactam 6 via hemiacetal 1, lactone 2, amide 3, oxo amide 4, and its cyclic t... alpha-Cyclodextrin Host-Guest Binding: A Computational Study of the Different Driving Forces [作者：Riniker, S; Daura, X; van Gunsteren, WF,期刊：Helvetica Chimica Acta, 页码：2318-2325 , 文章类型： Article，,卷期：2010年93-12] Free-energy differences govern the equilibrium between bound and unbound states of a host and its guest molecules. The understanding of the underlying entropic and enthalpic contributions, and their complex interplay are... Synthesis and Crystal Structure of 3,3,6,6-Tetramethylmorpholine-2,5-dione, and Its 5-Monothioxo and 2,5-Dithioxo Derivatives [作者：Mawad, N; Pour, FGS; Linden, A; Heimgartner, H,期刊：Helvetica Chimica Acta, 页码：2326-2346 , 文章类型： Article，,卷期：2010年93-12] The synthesis of 3,3-dimethylmorpholine-2,5-diones 4a was achieved conveniently via the 'direct amide cyclization' of the linear precursors of type 3, which were prepared by coupling of 2,2-dimethyl-2H-azirin-3-amines 2 ... Synthesis, Cytotoxicity and Antibacterial Studies of Novel Symmetrically and Nonsymmetrically 4-(Methoxycarbonyl)benzyl-Substituted N-Heterocyclic Carbene-Silver Acetate Complexes [作者：Patil, S; Dietrich, K; Deally, A; Gleeson, B; Muller-Bunz, H; Paradisi, F; Tacke, M,期刊：Helvetica Chimica Acta, 页码：2347-2364 , 文章类型： Article，,卷期：2010年93-12] From the reaction of 1H-imidazole (1a), 4,5-dichloro-1H-imidazole (1b), 1H-benzimidazole (1c), 1-methyl-1H-imidazole (1d), and 1-methyl-1H-benzimidazole (1f) with methyl 4-(bromomethyl)benzoate (2), symmetrically and non... Nucleotides Part LXXVIII Double Labeling of Nucleosides and Nucleotides [作者：Maier, T; Pfleiderer, W,期刊：Helvetica Chimica Acta, 页码：2365-2392 , 文章类型： Article，,卷期：2010年93-12] Several N(-hydroxyalkyl)-2,4-dinitroanilines were transformed into their phosphoramidites (see 5 and 6 in Scheme 1) in view of their use as fluorescence quenchers, and modified 2-aminobenzamides (see 9, 10, 18, and 19 in... A Unique Indolo-[1,7]naphthyridine Alkaloid from Incarvillea mairei var. grandiflora (WEHRH.) GRIERSON [作者：Shen, YH; Su, YQ; Tian, JM; Lin, S; Li, HL; Tang, JA; Zhang, WD,期刊：Helvetica Chimica Acta, 页码：2393-2396 , 文章类型： Article，,卷期：2010年93-12] A novel alkaloid with a unique indolo-[1,7]naphthyridine nucleus, incargranine B, was isolated from the whole plant of Incarvillea mairei var. grandiflora (WEHRH.) GRIERSON. Its structure was determined by means of spect... Novel Disubstituted Phenylene-Linked Bis-imidazole Derivatives: Facile Synthesis and Optical Properties [作者：Song, GL; Zhu, HJ; Chen, L; Liu, S; Luo, ZH,期刊：Helvetica Chimica Acta, 页码：2397-2405 , 文章类型： Article，,卷期：2010年93-12] Six novel disubstituted phenylene-linked bis-imidazole derivatives, 3a-3f, were prepared by a one-pot, microwave-assisted method under solvent-free conditions, in yields ranging from 61.6 to 85.6%. The new compounds were... Synthesis and Characterization of New 7-Substituted 6,14-Ethenomorphinane Derivatives: N-{5-[(5 alpha,7 alpha)-4,5-Epoxy-3,6-dimethoxy-17-methyl-6,14-ethenomorphinan-7-yl]-1,3,4-oxadiazol-2-yl}arenamines [作者：Yavuz, S; Yildirir, Y,期刊：Helvetica Chimica Acta, 页码：2406-2418 , 文章类型： Article，,卷期：2010年93-12] In this study, (5 alpha,7 alpha)-4,5-epoxy-3,6-dimethoxy-17-methyl-6,14-ethenomorphinan-7-carboxylic acid hydrazide (5) was synthesized by the condensation of methyl (5 alpha,7 alpha)-4,5-epoxy-3,6-dimethoxy-17-methyl-6,... A New Antifungal Cyclic Lipopeptide from Bacillus marinus B-9987 [作者：Liu, RF; Zhang, DJ; Li, YG; Tao, LM; Tian, L,期刊：Helvetica Chimica Acta, 页码：2419-2425 , 文章类型： Article，,卷期：2010年93-12] A new cyclic lipopeptide, marihysin A (1), along with the three known cyclodipeptides cyclo(Ala-Ile) (2), cyclo(Ala-Leu) (3), and cyclo(Ala-Tyr) (4), was isolated from the fermentation broth of the marine microorganism B... Total Synthesis of Aculeatins A and B from L-Malic Acid [作者：Yadav, JS; Rao, YG; Chandrakanth, D; Ravindar, K; Reddy, BVS,期刊：Helvetica Chimica Acta, 页码：2426-2432 , 文章类型： Article，,卷期：2010年93-12] An efficient total synthesis of the cytotoxic spiroketal natural products aculeatin A and B is described. The synthesis of the 1,3,5-triol moiety with appropriate configuration was accomplished from the commercially avai... A Novel 1-Glycosyl-1H-triazole-Based P,N Ligand for Rhodium-Catalyzed Asymmetric Hydrosilylation of Ketones [作者：Shen, C; Zhang, PF; Chen, XZ,期刊：Helvetica Chimica Acta, 页码：2433-2438 , 文章类型： Article，,卷期：2010年93-12] A novel class of chiral glycosyl-triazole-based P,N ligands were synthesized by 'click chemistry' and were applied to the Rh-catalyzed asymmetric hydrosilylation of a range of substituted acetophenones. Enantioselective ... Triterpenoids and Iridoid Glycosides from Gentiana dahurica [作者：Fan, H; Zang, Y; Zhang, Y; Zhang, HF; Zhao, Z; Hu, JF,期刊：Helvetica Chimica Acta, 页码：2439-2447 , 文章类型： Article，,卷期：2010年93-12] One new and six known pentacyclic triterpenoids, 1 and 4-9, resp., along with two new and three known iridoid glycosides, 2 and 3, and 10-12, resp., were isolated from the roots of Gentiana dahurica ('Qin-Jiao'). The new... Sesquiterpenoids from Senecio argunensis [作者：Xie, WD; Niu, YF; Huang, JJ; Row, KH,期刊：Helvetica Chimica Acta, 页码：2448-2453 , 文章类型： Article，,卷期：2010年93-12] Investigation of unpolar extracts from the aerial parts of Senecio argunensis afforded two new sesquiterpenoids, 1 beta-hydroxyeudesma-4,11-dien-15-al (1) and 4(15)-cadinene-5 alpha,10 alpha-diol, (2) as well as six know... Microwave-Assisted Three-Component Synthesis of Some Novel 1-Alkyl-1H-indole-2,3-dione 3-(O-Alkyloxime) Derivatives as Potential Chemotherapeutic Agents [作者：Rad, MNS; Khalafi-Nezhad, A; Babamohammadi, S; Behrouz, S,期刊：Helvetica Chimica Acta, 页码：2454-2466 , 文章类型： Article，,卷期：2010年93-12] A convenient and efficient method for a one-pot conversion of N-alkylisatins to N-alkylisatin O-alkyloximes 7a-7n as potential chemotherapeutic agents is described (Scheme) (isatin = 1H-indole-2,3-dione). In this method,... Neolignans and Caffeoyl Derivatives from Selaginella moellendorffii [作者：Wang, YH; Sun, QY; Yang, FM; Long, CL; Zhao, FW; Tang, GH; Niu, HM; Wang, HA; Huang, QQ; Xu, JJ; Ma, LJ,期刊：Helvetica Chimica Acta, 页码：2467-2477 , 文章类型： Article，,卷期：2010年93-12] Ten new phenolic compounds including the six neolignans 1-3 and 6-8 and four caffeoyl derivatives, i.e., myo-inositol 1-caffeate (9), myo-inositol 6-caffeate (10), myo-inositol 5-caffeate (11), and paucine 3'-beta-D-gluc... Withanolides from Aureliana fasciculata var. fasciculata [作者：Almeida-Lafeta, RC; Ferreira, MJP; Emerenciano, VP; Kaplan, MAC,期刊：Helvetica Chimica Acta, 页码：2478-2487 , 文章类型： Article，,卷期：2010年93-12] In the first phytochemical study of the Aureliana genus (Solanaceae), two new withanolides, 1 and 2, together with two known sterols, were isolated from the MeOH extract of the leaves of Aureliana fasciculata var. fascic...