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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22条记录   One-Pot Synthesis of 4-Substituted 3,4-Dihydro-3-methoxyisocoumarins via Carboxylation of alpha-Substituted 2-Lithio-beta-methoxystyrenes with Carbon Dioxide [作者：Kobayashi, K; Nagaoka, T; Shirai, Y; Miyatani, W; Yokoi, Y; Konishi, H,期刊：Helvetica Chimica Acta, 页码：191-196 , 文章类型： Article，,卷期：2012年95-2] A new type of isocoumarins (=1H-isochromen-1-ones=1H-2-benzopyran-1-ones), 4-substituted 3,4-dihydro-3-methoxyisocoumarins 2, can be obtained by a one-pot process from a-substituted 2-bromo-beta-methoxystyrenes 1. Thus, ... Trinuclear Non-Heme Iron Complexes Based on 4-Substituted 2,6-Diacylpyridine Ligands as Catalysts in Aerobic Allylic Oxidations [作者：Rabe, V; Frey, W; Baro, A; Laschat, S,期刊：Helvetica Chimica Acta, 页码：197-210 , 文章类型： Article，,卷期：2012年95-2] Taking the regio- and chemoselectivities of our iron complex precursors with pyridine core in aerobic oxidations into account, we envisioned a more effective influence on catalytic properties by the introduction of diffe... A Functionalized Spiro[chlorin-porphyrin]-Type 'Dimer' Dizinc Complex from Rapid [4+2] Self-cycloaddition of a Conjugated [beta beta '-Bis(methylene)porphyrinato]zinc [作者：Banala, S; Sintic, P; Krautler, B,期刊：Helvetica Chimica Acta, 页码：211-220 , 文章类型： Article，,卷期：2012年95-2] Thermal extrusion of SO2 from beta,beta'-sulfolenoporphyrins is an effective method for in situ generation of beta,beta'-bis(methylene)porphyrin which remained unobserved in typical synthetic applications but underwent q... Three New ent-Kaurane Diterpenoids from Siegesbeckia pubescens [作者：Liu, J; Feng, L; Li, HD; Dong, QL; Chen, R,期刊：Helvetica Chimica Acta, 页码：221-226 , 文章类型： Article，,卷期：2012年95-2] Three new ent-kaurane glucopyranosides, 2-O-[beta-D-apiofuranosyl-(1 -> 3)-2-O-isovaleryl-beta-D-glucopyranosyl]-4-epi-atractyligenin (1), 2-O-[beta-D-apiofuranosyl-(1 -> 3)-2-O-isovaleryl-beta-D-glucopyranosyl]atractyli... Stereoselective Total Synthesis of Stagonolide C [作者：Yadav, JS; Reddy, NM; Rao, NV; Rahman, MA; Prasad, AR,期刊：Helvetica Chimica Acta, 页码：227-234 , 文章类型： Article，,卷期：2012年95-2] A convergent and efficient total synthesis of stagonolide C (1), a phytotoxic metabolite, was achieved (Schemes 2 and 3) The synthesis exploited the high configuration control in the Prins cyclization along with alkene r... Yalongenes A and B, Two New Cembranoids with Cytoprotective Effects from the Hainan Soft Coral Sarcophyton trocheliophorum Marenzeller [作者：Yao, LG; Zhang, HY; Liang, LF; Guo, XJ; Mao, SC; Guo, YW,期刊：Helvetica Chimica Acta, 页码：235-239 , 文章类型： Article，,卷期：2012年95-2] Two new cembranoids, yalongenes A (1) and B (2), were isolated from the South China Sea soft coral Sarcophyton trocheliophorum Marenzeller. Their structures were elucidated by detailed spectroscopic analysis (IR, MS, and... Identification of Three New Flavonoids from the Peels of Citrus unshiu [作者：Shin, HJ; Nam, JW; Yoon, UJ; Han, AR; Seo, EK,期刊：Helvetica Chimica Acta, 页码：240-245 , 文章类型： Article，,卷期：2012年95-2] Three new flavonoids, 5,6,7,8,3',4'-hexamethoxyhomoflavone (1), 5,6,7,8,4'-pentamethoxyhomoflavone (2) and 3,6,7,8,2',5'-hexamethoxyflavone (3) were isolated from the peels of mature fruits of Citrus unshiu Marcow (Rutac... Isocyanide-Based Three-Component Synthesis of Highly Substituted 1,6-Dihydro-6,6-dimethylpyrazine-2,3-dicarbonitrile, 3,4-Dihydrobenzo[g]quinoxalin-2-amine, and 3,4-Dihydro-3,3-dimethyl-quinoxalin-2-amine Derivatives [作者：Shaabani, A; Hajishaabanha, F; Mofakham, H; Mahyari, M; Lali, B,期刊：Helvetica Chimica Acta, 页码：246-254 , 文章类型： Article，,卷期：2012年95-2] A novel and efficient isocyanide-based multicomponent reaction between alkyl or aryl isocyanides 1, 2,3-diaminomaleonitrile (2), naphthalene-2,3-diamines (6) or benzene-1,2-diamine (9), and 3-oxopentanedioic acid (3) or ... Two New Pentacyclic Triterpenoids from Centella asiatica [作者：Weng, XX; Zhang, J; Gao, W; Cheng, L; Shao, Y; Kong, DY,期刊：Helvetica Chimica Acta, 页码：255-260 , 文章类型： Article，,卷期：2012年95-2] Two new pentacyclic triterpenoids, named centelloside D (1) and centelloside E (9), together with the seven known compounds 28, were isolated from the whole plants of Centella asiatica. Compound 5 was reported for the fi... Four New Cuparene-Type Sesquiterpenes from Flammulina velutipes [作者：Wang, YQ; Bao, L; Yang, XL; Dai, HQ; Guo, H; Yao, XS; Zhang, LX; Liu, HW,期刊：Helvetica Chimica Acta, 页码：261-267 , 文章类型： Article，,卷期：2012年95-2] Flamvelutpenoids AD (14), four new cuparene-type sesquiterpenes, were isolated from the solid culture of Flammulina velutipes. Their structures were elucidated by NMR experiments. The absolute configurations of 1 and 2 w... Synthesis of Some C2-Symmetric Bidentate Ligands and Their Complexes Derived from Feist's Acid [作者：Al-Majid, AMA; Al-Othman, ZA; Islam, MS,期刊：Helvetica Chimica Acta, 页码：268-277 , 文章类型： Article，,卷期：2012年95-2] Various new C2-symmetric bidentate ligands, bearing phosphorus, nitrogen, and sulfur, were obtained in an efficient manner, starting from (+/-)-trans-3-methylidenecyclopropane-1,2-dicarboxylic acid (Feist's acid; (+/-)-t... One-Pot Synthesis of 4-(2,3-Dihydro-2-hydroxy-1,3-dioxo-1H-inden-2-yl)-Substituted 1-Aryl-1H-pyrazole-3-carboxylates via a Tandem Three-Component Reaction [作者：Alizadeh, A; Zarei, A; Rezvanian, A,期刊：Helvetica Chimica Acta, 页码：278-281 , 文章类型： Article，,卷期：2012年95-2] The hitherto unreported, highly functionalized 1H-pyrazole-3-carboxylates 3 have been synthesized in good yields via a one-pot three-component domino reaction of phenylhydrazines, dialkyl acetylenedicarboxylates, and nin... Highly Acetylated Lanostane-Type Triterpenoids from Coprinus cinereus 120 [作者：Liu, YZ; Li, YY; Sun, YF; Zheng, ZH; Song, SY; Su, WJ; Shen, YM,期刊：Helvetica Chimica Acta, 页码：282-285 , 文章类型： Article，,卷期：2012年95-2] Two new highly acetylated lanostane-type triterpenoids, coprinacin A (1) and coprinacin B (2), were isolated from the basidiomycetous strain Coprinus cinereus 120. The chemical structures of 1 and 2 were elucidated by sp... Triterpenoids from Melia toosendan [作者：Dong, SH; He, XF; Dong, L; Wu, Y; Yue, JM,期刊：Helvetica Chimica Acta, 页码：286-300 , 文章类型： Article，,卷期：2012年95-2] Eleven new triterpenoids, named mesendanins KU (111, resp.), together with seven known analogs, were isolated from the leaves and twigs of Melia toosendan. Their structures were elucidated on the basis of extensive spect... Five New Tetranortriterpenoids from the Seeds of Toona ciliata [作者：Jiang, SY; Liu, JQ; Xia, JJ; Yan, YX; Qiu, MH,期刊：Helvetica Chimica Acta, 页码：301-307 , 文章类型： Article，,卷期：2012年95-2] Five new tetranortriterpenoids, toonaciliatones BF (15, resp.), together with four known compounds, dihydrocedrelone (6), cedrelone (7), 6a-acetoxyazadirone (8), and 6a-acetoxy-14 beta,15 beta-epoxyazadirone (9), were is... Highly Conjugated Ergostane-Type Steroids and Aranotin-Type Diketopiperazines from the Fungus Aspergillus terreus BCC 4651 [作者：Haritakun, R; Rachtawee, P; Komwijit, S; Nithithanasilp, S; Isaka, M,期刊：Helvetica Chimica Acta, 页码：308-313 , 文章类型： Article，,卷期：2012年95-2] Two new ergostane derivatives, 12 beta,15a,25,26-tetrahydroxyergosta-4,6,8(14),22-tetraen-3-one (1) and 12 beta,15a,25,28-tetrahydroxyergosta-4,6,8(14),22-tetraen-3-one (2), and a new aranotin-type diketopiperazine, bisd...