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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23条记录   Oligonucleotide Analogues with Integrated Bases and Backbone Part 28 Hydrazide- and Amide-Linked Analogues. 2. Di-, Tetra-, Octa-, and Decamers: Synthesis and Association [作者：De Giacomo, F; Peifer, M; Rajic, Z; Vasella, A,期刊：Helvetica Chimica Acta, 页码：1153-1193 , 文章类型： Article，,卷期：2011年94-7] The protected hydrazide-linked uracil- and adenine-derived tetranucleoside analogues 17, 19, and 21 were synthesized in solution by coupling the dimeric hydrazines 6 and 10 with the carboxylic acids 7, 11, and 16. These ... Introduction of Adjacent Oxygen-Functionalities in Dimethyl Heptalenedicarboxylates [作者：Rogano, F; Stojnic, D; Linden, A; Abou-Hadeed, K; Hansen, HJ,期刊：Helvetica Chimica Acta, 页码：1194-1215 , 文章类型： Article，,卷期：2011年94-7] The bromination of dimethyl 8-methoxy-1,6,10-trimethylheptalene-4,5-dicarboxylate (6; Scheme 2) with N-bromosuccinimide (NBS) in N,N-dimethylformamide (DMF) leads in acceptable yields to the corresponding 9-bromoheptalen... A Novel Synthesis of gamma,delta-Unsaturated Aldehydes from alpha-Formyl-gamma-lactones [作者：Snowden, RL; Brauchli, R; Linder, S,期刊：Helvetica Chimica Acta, 页码：1216-1225 , 文章类型： Article，,卷期：2011年94-7] A preparatively useful one-step transformation of gamma,gamma-disubstituted alpha-formyl-gamma-lactones into trisubstituted gamma,delta-unsaturated aldehydes is described, by means of catalytic amounts of either AcOH or ... Asymmetric Total Synthesis of Stagonolide G [作者：Ramesh, D; Rajaram, S; Prabhakar, P; Ramulu, U; Reddy, DK; Venkateswarlu, Y,期刊：Helvetica Chimica Acta, 页码：1226-1233 , 文章类型： Article，,卷期：2011年94-7] A simple asymmetric total synthesis of stagonolide G (1) is described. Asymmetric dihydroxylation, regioselective epoxide ring opening, and vinyl Grignard reactions are involved in generating the stereogenic centers C(4)... Synthesis of 2,3-Diaryl-3H-pyrrolo[2,3-c]pyridin-3-ol Derivatives by the Reaction of Aryl(3-isocyanopyridin-4-yl)methanones with Aryl Grignard Reagents [作者：Kobayashi, K; Kozuki, T; Konishi, M; Suzuki, T; Tanmatsu, M; Konishi, H,期刊：Helvetica Chimica Acta, 页码：1234-1238 , 文章类型： Article，,卷期：2011年94-7] The reaction of aryl(3-isocyanopyridin-4-yl)methanones 1, easily prepared from commercially available pyridin-3-amine, with aryl Grignard reagents gave, after aqueous workup, 2,3-diaryl-3H-pyrrolo[2,3-c]pyridin-3-ols 2. ... Five New Biflavonoids from Daphne aurantiaca [作者：Liang, S; Shen, YH; Tian, JM; Feng, Y; Xiong, Z; Zhang, WD,期刊：Helvetica Chimica Acta, 页码：1239-1245 , 文章类型： Article，,卷期：2011年94-7] Five new biflavonoids, 1-5, were isolated from the stem bark of Daphne aurantiaca. The structures were elucidated as 2,2 ''-bisteppogenin (1), 2,2 ''-bisteppogenin 7-O-beta-glucopyranoside (2), 2 ''-dehydroxy-2,2'''-bist... First Stereoselective Total Synthesis of Gallicynoic Acids G and H [作者：Krishna, PR; Anitha, K,期刊：Helvetica Chimica Acta, 页码：1246-1253 , 文章类型： Article，,卷期：2011年94-7] A stereoselective convergent total synthesis of two acetylenic acids, gallicynoic acid G (1) and H (2), is reported, involving asymmetric reduction of alkynones 3 and 4, respectively, with the Corey-Bakshi-Sibata (CBS) c... Sesquiterpenoids from Fusarium sp., an Endophytic Fungus in Agriminia pilosa [作者：Shan, WG; Chen, XX; Ying, YM; Zhan, ZJ,期刊：Helvetica Chimica Acta, 页码：1254-1259 , 文章类型： Article，,卷期：2011年94-7] Cultivation of the endophytic fungus isolated from the stems of Agriminia pilosa provided four new sesquiterpenoids, namely agripilols A-D (1-4, resp.). Structures of these isolates were elucidated by NMR and MS data. Th... Spin Trapping of Radical Intermediates Generated by the Oxidation of Substituted 4-Methylphenols [作者：Majzlik, P; Omelka, L; Superatova, R; Holubcova, P,期刊：Helvetica Chimica Acta, 页码：1260-1268 , 文章类型： Article，,卷期：2011年94-7] A series of substituted 4-methylphenols 1 and 2 was oxidized with PbO2 in the presence of nitroso compounds 3-10. The formation of adducts of benzyl radicals with the nitroso spin traps in the reaction mixture was establ... Sesquiterpenoids from the Aerial Parts of Inula japonica [作者：Gong, HQ; Wu, QX; Liu, LL; Yang, JL; Wang, R; Shi, YP,期刊：Helvetica Chimica Acta, 页码：1269-1276 , 文章类型： Article，,卷期：2011年94-7] Fourteen sesquiterpenoids with an eudesmane C-atom skeleton, including four new ones, (1 beta,5 alpha,7 beta,8 beta,11 beta)-5-hydroperoxy-1-hydroxyeudesm-4(15)-eno-12,8-lactone (1), (1 beta,5 beta,7 beta,8 beta)-8-(acet... Synthesis of 9,9-Disubstituted 9H-Pyrrolo[1,2-a]indoles by Hydriodic Acid-Catalyzed Cyclization of 1-[2-(1-Aryl(or methyl)ethenyl)phenyl]-1H-pyrroles [作者：Kobayashi, K; Hashimoto, K; Hashimoto, H; Kondo, H; Konishi, H,期刊：Helvetica Chimica Acta, 页码：1277-1282 , 文章类型： Article，,卷期：2011年94-7] A novel method is reported for the synthesis of 9,9-disubstituted 9H-pyrrolo[1,2-a]indoles. Cyclization of 1-[2-(1-aryl(or methyl)ethenyl)phenyl]-1H-pyrroles, which can be easily prepared from 2-(1-aryl(or methyl)ethenyl... Highly Acylated 3,4-Secograyanane Diterpenoids from the Fruits of Pieris formosa [作者：Wu, ZY; Li, HM; Li, YD; Li, HZ; Li, RT,期刊：Helvetica Chimica Acta, 页码：1283-1289 , 文章类型： Article，,卷期：2011年94-7] From the fruits of Pieris formosa, four new highly acylated 3,4-secograyanane diterpenoids, secorhodomollolides E-H (1-4, resp.), along with two known ones, secorhodomollolides C and D (5 and 6, resp.), were obtained. Th... Stereoselective Total Synthesis of Rugulactone [作者：Das, B; Srinivas, Y; Sudhakar, C; Reddy, PR,期刊：Helvetica Chimica Acta, 页码：1290-1295 , 文章类型： Article，,卷期：2011年94-7] The stereoselective synthesis of the naturally occurring dihydropyranone rugulactone has been accomplished starting from 3-phenylpropan-1-ol employing Maruoka allylation and ring-closing metathesis as the key steps. Three New Steroidal Glycosides from the Roots of Cynanchum auriculatum [作者：Lu, Y; Xiong, H; Teng, HL; Yang, GZ; Mei, ZN,期刊：Helvetica Chimica Acta, 页码：1296-1303 , 文章类型： Article，,卷期：2011年94-7] Three new C-21 steroidal glycosides with a cinnamoyl group at C(12) and a 2-methylbutanoyl group at C(20), and a straight sugar chain at C(3), namely cyanoauriculosides C-E (1-3, resp.), together with three known steroid... A Novel Synthesis of Isoflavones via Copper(I)-Catalyzed Intramolecular Cyclization Reaction [作者：Li, QL; Liu, QL; Ge, ZY; Zhu, YM,期刊：Helvetica Chimica Acta, 页码：1304-1309 , 文章类型： Article，,卷期：2011年94-7] Isoflavone derivatives were synthesized via intramolecular cyclization of 3-(2-bromophenyl)-3-oxopropanal derivatives, using CuI as the catalyst, 2-picolinic acid (= pyridine-2-carboxylic acid) as the ligand, K2CO3 as th... Two New Phenolic Compounds from the Rhizomes of Gastrodia elata BLUME [作者：Han, AR; Shin, HJ; Jeon, HR; Lee, JH; Lee, D; Seo, EK,期刊：Helvetica Chimica Acta, 页码：1310-1314 , 文章类型： Article，,卷期：2011年94-7] Phytochemical investigation of the rhizomes of Gastrodia elata BLUME (Orchidaceae) led to the isolation and identification of twelve compounds, including two new phenolic compounds, 4-hydroxybenzyl vanillyl ether (=4-{[(...