- A New Cardenolide and Two New Pregnane Glycosides from the Root Barks of Periploca sepium
[作者:Deng, YR; Wei, YP; Yin, F; Yang, H; Wang, Y,期刊:Helvetica Chimica Acta, 页码:1602-1609 , 文章类型: Article,,卷期:2010年93-8]
- A new cardenolide and two new pregnane glycosides. periplogenin 3-[O-beta-glucopyranosyl-(1 -> 4)-beta-sarmentopyranoside] (1). (3 beta,20S)-pregn-5-ene-3,17,20-triol 20-[O-beta-glucopyranosyl-(1 -> 6)-O-glucopyranosyl-(...
- Regioselective Synthesis of 5-(Arylsulfanyl)- and 5-(Benzylsulfanyl)-6-phenylsalicylates by One-Pot Cyclizations of 1,3-Bis(silyloxy)buta-1,3-dienes with 2-(Arylsulfanyl)- and 5-(Benzylsulfanyl)-3-ethoxy-1-phenylprop-2-en-1-ones
[作者:Fatunsin, O; Shkoor, M; Riahi, A; Hussain, M; Villinger, A; Fischer, C; Langer, P,期刊:Helvetica Chimica Acta, 页码:1610-1621 , 文章类型: Article,,卷期:2010年93-8]
- 5-(Arylsulfanyl)- and 5-(Benzylsulfanyl)-6-phenylsalicylates by One-Pot Cyclizations of 1,3-Bis(silyloxy)buta-1,3-dienes with 2-(Arylsulfanyl)- and 5-(Benzylsulfanyl)-3-ethoxy-1-phenylprop-2-en-1-ones
- Three New Paeonidanin-Type Monoterpene Glycosides from Paeonia suffruticosa ANDR.
[作者:Yang, Y; Hu, HY; Yu, NJ; Zhang, Y; Zhao, YM,期刊:Helvetica Chimica Acta, 页码:1622-1627 , 文章类型: Article,,卷期:2010年93-8]
- Three new paeonidanin-type monoterpene glycosides, named suffrupaeonidanins A-C. were isolated as minor components from the root cortex of Paeonia suffruticosa ANDR Their structures were elucidated by a combination of 1D...
- A New Nortriterpene from the Root of Celastrus hypoleucus
[作者:Wang, H; Tian, XA; Ying, GQ,期刊:Helvetica Chimica Acta, 页码:1628-1633 , 文章类型: Article,,卷期:2010年93-8]
- A new nortriterpene, 2-hydroxy-3-methyl-21-oxo-12,24-dinor-D B-friedooleana-1,3,5(10),7-tetra-en-29-oic acid (1). was isolated from the root of Celastrus hypolencus, together with the two known compounds. celastorol (2) ...
- One-Step Synthesis of 1-(4,5-Diphenylpyrimidin-2-yl)thiourea
[作者:Han, WY; Zhang, ZT; Zhang, YC; Xue, D; Li, G,期刊:Helvetica Chimica Acta, 页码:1641-1649 , 文章类型: Article,,卷期:2010年93-8]
- A simple and straightforward methodology toward the synthesis of novel 1-(4,5-diphenylpyrimidin-2-yl)thiourea has been developed by a one-step reaction of isoflavones with amidinothiourea A series of 16 new compounds was...
- Hydroformylation of Oct-1-ene in Novel Ionic Liquid Crystals
[作者:Yang, J; Li, FF; Zhang, JA; Li, J; Wang, WX,期刊:Helvetica Chimica Acta, 页码:1653-1660 , 文章类型: Article,,卷期:2010年93-8]
- Hydroformylatton of oct-1-ene leading to nonanal (denoted by n) and 2-methyloctanal (denoted by iso). in a novel series of caprolactam-based and common imidazolium-based ionic liquid crystals (ILCs, see Fig I) carried ou...
- O-2 ',3 '-Ketal-Nucleolipids of the Cytostatic 5-Fluorouridine: Synthesis, Lipophilicity, and Acidic Stability
[作者:Malecki, E; Rosemeyer, H,期刊:Helvetica Chimica Acta, 页码:1500-1512 , 文章类型: Article,,卷期:2010年93-8]
- The synthesis of a series of cyclic and acyclic O-2',3'-ketal derivatives of the cancerostatic 5-fluorourichne (2a) is described The novel compounds were characterized by H-1- and C-13-NMR, and UV spectroscopy, as well a...
- The Propensity of alpha-Aminoisobutyric Acid (=2-Methylalanine; Aib) to Induce Helical Secondary Structure in an alpha-Heptapeptide: A Computational Study
[作者:Wang, DQ; Friedmann, M; Gattin, Z; Jaun, B; van Gunsteren, WF,期刊:Helvetica Chimica Acta, 页码:1513-1531 , 文章类型: Article,,卷期:2010年93-8]
- We present a molecular-dynamics simulation study of an alpha-heptapeptide containing an alpha-aminoisobutyric acid (=2-methylalanine. Aib) residue, Val(1)-Ala(2)-Leu(3)-Aib(4)-Ile(5)-Met(6)-Phe(7), and a quantum-mechanic...
- The Adverse Effect of Benzannelation on the Aromaticity of Oxocinyl Anion: A Combined Experimental and Theoretical Study
[作者:Kasmai, HS; Wang, XD; Doan, HN; Femia, JF; Yablonsky, TM; Read, ME; Dutton, DT,期刊:Helvetica Chimica Acta, 页码:1532-1544 , 文章类型: Article,,卷期:2010年93-8]
- A synthesis of 2H-1-benzoxocin from readily available compounds was accomplished The potentially 'aromatic' pi-excessive systems 2H-1-benzoxocinyl and 6H-dibenz[b,f]oxocinyl anions were generated from their corresponding...
- Report on an Unusual Cascade Reaction between Azulenes and 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (=4,5-Dichloro-3,6-dioxocyclohexa-1,4-diene-1,2-dicarbonitrile; DDQ)
[作者:Sigrist, R; Hansen, HJ,期刊:Helvetica Chimica Acta, 页码:1545-1567 , 文章类型: Article,,卷期:2010年93-8]
- The oxidation of 1-(3,8-dimethylazulen-1-yl)alkan-1-ones 1 with 2,3-dichloro-5.6-dicyano-1,4-benzoquinone (=4,5-dichloro-3,6-dioxocyclohexa-1,4-diene-1,2-dicarbonitrile; DDQ) in acetone/H2O mixtures at room temperature d...
- A New Method for the Synthesis of Nonsymmetrically Substituted Bis(azulen-1-yl) Ketones
[作者:Sigrist, R; Hansen, HJ,期刊:Helvetica Chimica Acta, 页码:1568-1582 , 文章类型: Article,,卷期:2010年93-8]
- The 1-(3-methylazulen-1-yl)alkan-1-ones, when oxidized with excess 2,3-dichloro-5.6-clicyano-1,4-benzoquinone (=4 5-dichloro-3,6-choxocyclohexa-1,4-diene-1,2-dicarbonitrile, DDQ) in aqueous acetone in the presence of 1-(...
- Stereoselective Synthesis of [5-[4,4,4,4 ',4 ',4 '-Hexafluoro-N-(2-hydroxyethoxy)-D-valine]]- and [5-[4,4,4,4 ',4 ',4 '-Hexafluoro-N(2-hydroxyethoxy)-L-valine]]cyclosporin A(1))
[作者:Eberle, MK; Keese, R,期刊:Helvetica Chimica Acta, 页码:1583-1601 , 文章类型: Article,,卷期:2010年93-8]
- Addition of various amines to the 3,3-bis(trifluoromethyl)acrylamides 10a and 10b gave the tripeptides 11a-11f, mostly as mixtures of epimers (Scheme 3) The crystalline tripeptide 11f(2) was found to be the N-terminal (2...
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