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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19条记录   Comparison of DNA Complex Formation Behaviour for Two Closely Related Lexitropsin Analogues [作者：Parkinson, JA; Khalaf, AI; Anthony, NG; MacKay, SP; Suckling, CJ; Waigh, RD,期刊：Helvetica Chimica Acta, 页码：795-822 , 文章类型： Article，,卷期：2009年92-5] Two closely related lexitropsin analogues that differ only in the form of the 'headgroup' functionality (CHO (for 1) vs. Ac (for 2)) have been studied in their DNA-binding capacity for the sequence d(GCATATATGC) using H-... Syntheses of 5-Chlorouracils/Thymines with 1-[Phosphono(Methyl/Difluoromethyl)]-1,2-Unsaturated-Moiety-Substituted Methyl Groups at N(1) and Human Thymidine Phosphorylase Inhibitory Activity [作者：Birck, MR; Clinch, K; Gainsford, GJ; Schramm, VL; Tyler, PC,期刊：Helvetica Chimica Acta, 页码：823-838 , 文章类型： Article，,卷期：2009年92-5] By attaching (methyl)- or (difluoromethyl)-phosphonate groups to the 1-positions of ethene, cyclopentene or benzene, and attaching 1-(methyl)-5-chlorouracil or 1-(methyl)thymine groups to the corresponding 2-positions, c... New Derivatives of Ascomycin with Modifications in the Amino Acid Region - Synthesis and Biological Activities, and X-Ray Crystal Structure of 5,6-Dehydroascomycin [作者：Bulusu, MARC; Waldstatten, P; Tricotet, T; Rochais, C; Steck, A; Bacher, M; Schulz, G; Meingassner, JG; Hiestand, P; Zenke, G; Schuler, W; Wagner, T,期刊：Helvetica Chimica Acta, 页码：839-889 , 文章类型： Article，,卷期：2009年92-5] The immunomodulatory macrolide ascomycin (1a) inhibits T-cell activation via binding to macrophilin-12 and inhibition of the phosphatase calcineurin. Its structural analogs pimecrolimus and tacrolimus have recently be... Unexpected Kinetics in the Polymerization of Ethene by Cp-2*ZrCl2/MAO [作者：di Lena, F; Chen, P,期刊：Helvetica Chimica Acta, 页码：890-896 , 文章类型： Article，,卷期：2009年92-5] A sterically hindered metallocene catalyst. Cp-2*ZrCl2 activated with methylaluminoxane (MAO), is found to polymerize ethene at temperatures up to 60 degrees with a good propagation rate constant but low number of active... Copper- and Phosphine-Free Sonogashira Coupling Reaction Catalyzed by Polyurea-Encapsulated Palladium(II) [作者：Kuang, YY; Chen, FE,期刊：Helvetica Chimica Acta, 页码：897-902 , 文章类型： Article，,卷期：2009年92-5] A polyurea-encapsulated palladium catalyst (Pd EnCat (TM) 30) was first applied to Sonogashira cross-coupling reactions in the absence of a copper salt co-catalyst and under phosphine-free conditions. This polymer-anchor... Stereoselective Synthesis of cis- and trans-3,4-Dihydro-3,4,8-trihydroxynaphthalen-1(2H)-one [作者：Couche, E; Fkyerat, A; Tabacchi, R,期刊：Helvetica Chimica Acta, 页码：903-917 , 文章类型： Article，,卷期：2009年92-5] A short and efficient protocol for the stereoselective synthesis of racemic trans- and cis-3,4-dihydro3,4,8-trihydroxynaphthalen-1(2H)-one (1 and 2, resp.), is described, comprising nine and eight steps starting from com... Synthesis and Evaluation of N-Acetyl-2-amino-2-deoxy-alpha-D-galactosyl 1-Thio-7-oxaceramide, a New Analogue of alpha-D-Galactosyl Ceramide [作者：Rajan, R; Mathew, T; Buffa, R; Bornancin, F; Cavallari, M; Nussbaumer, P; De Libero, G; Vasella, A,期刊：Helvetica Chimica Acta, 页码：918-927 , 文章类型： Article，,卷期：2009年92-5] The N-acetyl-2-amino-2-deoxy-alpha-D-galactopyranosyl 1-thio-7-oxaceramide 1 was synthesized by substituting the 7-oxasphingosine triflate 3 with alpha-D-N-acetyl-1-thiogalactosamine (2). The triflate 3 was obtained from... Two New Quinoline Alkaloid Mannopyranosides from Solidago canadensis [作者：Li, YK; Zhao, QJ; Hu, J; Zou, Z; He, XY; Yuan, HB; Shi, XY,期刊：Helvetica Chimica Acta, 页码：928-931 , 文章类型： Article，,卷期：2009年92-5] Two novel quinoline alkaloid beta-D-mannopyranosides, named dictamnine-7-beta-D-mannopyranoside (1) and 8-methoxydictamnine-7-beta-D-mannopyranoside (2), were isolated from the whole plant of Solidago canadensis. Their s... An Efficient Synthesis of Novel Hexahydropyrido[2,3-d]pyrimidine Derivatives from (Arylmethylidene)pyruvic Acids (=(3E)-4-Aryl-2-oxobut-3-enoic Acids in Aqueous Media [作者：Balalaie, S; Abdolmohammadi, S; Soleimanifard, B,期刊：Helvetica Chimica Acta, 页码：932-936 , 文章类型： Article，,卷期：2009年92-5] A series of new hexahydropyrido[2,3-d]pyrimidine derivatives 3 were synthesized by the cyclo-condensation reaction of (arylmethylidene)pyruvic acids (=(3E)-4-aryl-2-oxobut-3-enoic acids) 1 and 6-aminouracils (=6-aminopyr... Two New C-21 Steroidal Glycosides from the Stems of Cynanchum paniculatum KiTAG. [作者：Huang, X; Tan, AM; Yang, SB; Zhang, AY; Zhang, H,期刊：Helvetica Chimica Acta, 页码：937-943 , 文章类型： Article，,卷期：2009年92-5] Two new glycosides, (3 beta,8 beta,9 alpha,16 alpha,17 alpha)-14,16 beta: 15,20 alpha:18,20 beta-triepoxy-16 alpha, 17 alpha-dihydroxy-14-oxo-13, 14:14, 15-disecopregna-5,13(18)-dien-3-yl alpha-cymaropyranosyl-(1 -> 4)-a... One-Pot Three-Component Synthesis of 2-(Alkylimino)-7-oxo-1-oxa-6-azaspiro[4.4]nona-3,8-diene-3,4-dicarboxylates [作者：Adib, M; Moghimi, S; Sayahi, MH; Bijanzadeh, HR,期刊：Helvetica Chimica Acta, 页码：944-949 , 文章类型： Article，,卷期：2009年92-5] The reactive zwitterionic 1:1 intermediate 6 generated in situ from the reaction between an isocyanide 2 and a dialkyl acetylenedicarboxylate (=dialkyl but-2-ynedioate) 3 was trapped by an N-arylmaleimide or -phthalimide... Secocycloartane Triterpenoidal Saponins from the Leaves of Astragalus membranaceus BUNGE [作者：Kuang, HX; Okada, Y; Yang, BY; Tian, ZK; Okuyama, T,期刊：Helvetica Chimica Acta, 页码：950-958 , 文章类型： Article，,卷期：2009年92-5] Two new 9,10-secocycloartane triterpenoidal saponins. named huangqiyenins E (1) and F (2) were isolated from the leaves of Astragalus membranaceus BUNGE. Enzymatic hydrolysis of 1 and 2 afforded the aglycones huangqiyege... Synthesis of Substituted 1,8-Naphthyridine-3-carboxylates from Baylis-Hillman Adducts of Substituted 2-Chloronicotinaldehydes [作者：Narender, P; Ravinder, M; Sadhu, PS; Raju, BC; Ramesh, C; Rao, VJ,期刊：Helvetica Chimica Acta, 页码：959-966 , 文章类型： Article，,卷期：2009年92-5] A series of substituted 1,8-naphthyridine-3-carboxylates were synthesized for the first time from the Baylis-Hillman adducts obtained from 2-chloronicotinaldehyde derivatives. Three methods were adopted to synthesize 1,8... Stereoselective Routes for the Total Synthesis of (+)-Cryptocarya Diacetate [作者：Sabitha, G; Reddy, NM; Prasad, MN; Yadav, JS,期刊：Helvetica Chimica Acta, 页码：967-976 , 文章类型： Article，,卷期：2009年92-5] A stereoselective total synthesis of (+)-cryptocarya diacetate (1) was achieved by two different routes (Schemes 2 and 3). The sequences involve LiAlH4/LiI reduction, ring-closing metathesis, Prins cyclization, Wacker ox... Nitrogen-Rich Salts Based on the Energetic 5,5 '-(Hydrazine-1,2-diyl)bis[1H-tetrazolide] Anion [作者：Eberspacher, M; Klapotke, TM; Sabate, CM,期刊：Helvetica Chimica Acta, 页码：977-996 , 文章类型： Article，,卷期：2009年92-5] The reaction of 5,5'-(hydrazine-1,2-diyl)bis[1H-tetrizole] (HBT) with N-bases yielded a new family of energetic N-rich salts based on the 5,5'-(hydrazine-1,2-diyl)bis[1H-tetrazol-1-ide] anion with ammonium (see 1), hydra... Two New Secolignans from the Roots of Urtica fissa E. PRITZ [作者：Ji, BQ; Yan, XG; Duan, LX; Tang, L; Shi, LY; Wang, YQ; Feng, BM,期刊：Helvetica Chimica Acta, 页码：997-1001 , 文章类型： Article，,卷期：2009年92-5] Two new secolignans, {(3S,4S)-4-[bis(4-hydroxy-3-methoxyphenyl)methyl]-2-oxotetrthydrofuran-3yl}methyl beta-D-glucopyranoside (1) and its stereoisomer {(3S,4R)-4-[bis(4-hydroxy-3-methoxyphenyl)methyl]-2-oxotetrahydrofura...