- Stereoselective Preparation of 3-Amino-2-fluoro Carboxylic Acid Derivatives, and Their Incorporation in Tetrahydropyrimidin-4(1H)-ones, and in Open-Chain and Cyclic beta-Peptides
[作者：Yoshinari, T; Gessier, F; Noti, C; Beck, AK; Seebach, D,期刊：Helvetica Chimica Acta, 页码：1908-1942 , 文章类型： Article，,卷期：2011年94-11]
- The preparation of (2S,3S)- and (2R,3S)-2-fluoro and of (3S)-2,2-difluoro-3-amino carboxylic acid derivatives, 13, from alanine, valine, leucine, threonine, and beta 3h-alanine (Schemes 1 and 2, Table) is described. The ...
- Exquisite Synthesis of a Designed PAR-1 Antagonist
[作者：Miao, HM; Zhao, GL; Zhang, LS; Shao, H; Wang, JW,期刊：Helvetica Chimica Acta, 页码：1981-1993 , 文章类型： Article，,卷期：2011年94-11]
- The synthesis of a designed, sterically congested geminal dimethyl-bearing PAR-1 antagonist was achieved by a route of ten steps, with the oxidation of an electron-rich benzaldehyde, the construction of a tertiary alkyl ...
- Interconversion of cis- and trans-Fused Oxabicyclo[5.2.0]nonan-2-ones
[作者：Schmidt, K; Margaretha, P,期刊：Helvetica Chimica Acta, 页码：1994-2001 , 文章类型： Article，,卷期：2011年94-11]
- On irradiation (350 nm) in the presence of alkenes (2,3-dimethylbut-2-ene, 1,1-dimethoxyethene, and 2,4,4-trimethylpent-1-ene), benzoxepinone 1 and dioxepinone 2 are converted into mixtures of cis- and trans-fused oxabic...
- Synthesis of 2-Aryl-2,3-dihydro-3-sulfanyl-1H-isoindol-1-ones by Pummerer-Type Cyclization of N-Aryl-2-(sulfinylmethyl)benzamides
[作者：Kobayashi, K; Hashimoto, H; Suzuki, T; Konishi, H,期刊：Helvetica Chimica Acta, 页码：2002-2009 , 文章类型： Article，,卷期：2011年94-11]
- An efficient method for the synthesis of 2-aryl-2,3-dihydro-3-sulfanyl-1H-isoindol-1-ones 1 via Pummerer-type cyclization of N-aryl-2-(sulfinylmethyl)benzamides 2 is described. Thus, treatment of these sulfinyl-benzamide...
- New Dammarane-Type Saponins from the Rhizomes of Panax japonicus
[作者：Zhou, M; Xu, M; Wang, D; Zhu, HT; Yang, CR; Zhang, YJ,期刊：Helvetica Chimica Acta, 页码：2010-2019 , 文章类型： Article，,卷期：2011年94-11]
- Phytochemical investigation of the rhizomes of Panax japonicus C. A. Meyer (Araliaceae) resulted in the isolation of two new dammarane-type triterpenoid saponins, yesanchinoside R1 (1) and yesanchinoside R2 (2), together...
- Two New Cryptoporic Acid Derivatives from the Fruiting Bodies of Cryptoporus sinensis
[作者：Wu, W; Zhao, F; Bao, L; Lu, JC; Liu, HW,期刊：Helvetica Chimica Acta, 页码：2020-2026 , 文章类型： Article，,卷期：2011年94-11]
- Two new drimane-type sesquiterpenoid ethers of isocitric acid, cryptoporic acids N (1) and O (6), were isolated from the fruiting bodies of Cryptoporus sinensis. Their structures were established by means of spectroscopi...
- Radical Cyclization of Fluorinated 1,3-Dicarbonyl Compounds with Dienes Using Manganese(III) Acetate and Synthesis of Fluoroacylated 4,5-Dihydrofurans
[作者：Yilmaz, M; Yilmaz, EVB; Pekel, AT,期刊：Helvetica Chimica Acta, 页码：2027-2038 , 文章类型： Article，,卷期：2011年94-11]
- Radical cyclizations of fluorinated 1,3-dicarbonyl compounds with dienes mediated by Mn(OAc)3 afforded 4,5-dihydrofurans containing difluoroacetyl, trifluoroacetyl, or heptafluorobutanoyl groups in good-to-excellent yiel...
- An Unexpected Result of the Reaction of Benzothioamide Derivatives with 2-Aryl-2-bromoacetonitriles
[作者：Boeini, HZ; Mobin, M,期刊：Helvetica Chimica Acta, 页码：2039-2044 , 文章类型： Article，,卷期：2011年94-11]
- Unexpectedly, in the reaction of 2-bromo-2-phenylacetonitrile derivatives with 2 mol-equiv. of benzothioamide in DMSO, 3,5-diaryl-1,2,4-thiadiazoles were obtained in excellent yields (8390%) and in short reaction times (...
- Efficient Synthesis of 2-(2-Aminophenyl)-2,3-dihydropyridin-4(1H)-ones Based on a Cyclization/Ring Cleavage Procedure
[作者：Karapetyan, V; Mkrtchyan, S; Karapetyan, G; Villinger, A; Saghiyan, A; Ghochikyan, TV; Langer, P,期刊：Helvetica Chimica Acta, 页码：2045-2053 , 文章类型： Article，,卷期：2011年94-11]
- (Benzyloxycarbonyl)-protected 3,4-benzo-7-hydroxy-2,9-diazabicyclo[3.3.1]non-7-enes were prepared by one-pot cyclizations of 1,3-bis(silyl enol ethers) with quinazolines. Subsequent hydrogenation resulted in one-pot depr...
- Euphane Triterpenes from the Bark of Broussonetia papyrifera
[作者：Zhong, HT; Li, F; Chen, B; Wang, MK,期刊：Helvetica Chimica Acta, 页码：2061-2065 , 文章类型： Article，,卷期：2011年94-11]
- Four new euphane triterpenes, (3 beta)-3-(acetyloxy)eupha-7,25-dien-24-one (1), (3 beta,24R)-3-(acetyloxy)eupha-7,25-dien-24-ol (2), (3 beta,24S)-eupha-7,25-diene-3,24-diol (3), and (3 beta,24R)-eupha-7,25-diene-3,24-dio...
- Acylated Triterpene Saponins from Atroxima liberica STAPF
[作者：Tabopda, TK; Mitaine-Offer, AC; Miyamoto, T; Tanaka, C; Mirjolet, JF; Duchamp, O; Ngadjui, BT; Lacaille-Dubois, MA,期刊：Helvetica Chimica Acta, 页码：2066-2076 , 文章类型： Article，,卷期：2011年94-11]
- The four new acylated triterpene saponins 14, isolated as two pairs of isomers and named libericosides A1/A2 and B1/B2, one pair of isomers 5/6, the (Z)-isomer libericoside C2 (5) being new, one new sucrose ester, atroxi...
- Stereochemical Investigation of Macrocyclic Bisbibenzyls with a Stereogenic Center at One of the Ethylene Bridges
[作者：Xie, CF; Zhu, RX; Qu, JB; Wang, LN; Guo, DX; Yu, WT; Liu, CB; Lou, HX,期刊：Helvetica Chimica Acta, 页码：2077-2086 , 文章类型： Article，,卷期：2011年94-11]
- 7'-Hydroxyriccardin C (1) and marchantin E (2), two macrocyclic bisbibenzyls with a stereogenic center at the ethylene bridge from Chinese liverworts, were investigated stereochemically. Compound 1 was found to be optica...
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