- Substrate Range of the Titanium TADDOLate Catalyzed Asymmetric Fluorination of Activated Carbonyl Compounds
[作者:Bertogg, A; Hintermann, L; Huber, DP; Perseghini, M; Sanna, M; Togni, A,期刊:Helvetica Chimica Acta, 页码:353-403 , 文章类型: Article,,卷期:2012年95-3]
- The substrate range of the [TiCl2(TADDOLate)] (TADDOL=a,a,a',a'-tetraaryl-1,3-dioxolane-4,5-dimethanol)-catalyzed asymmetric a-fluorination of activated beta-carbonyl compounds has been investigated. Optimal conditions f...
- Abieseconordines A and B, Two Novel Norditerpenoids with a 18-Nor-5,10:9,10-disecoabietane Skeleton from Abies forrestii
[作者:Yu, P; Zhang, SD; Li, YL; Yang, XW; Zeng, HW; Li, HL; Zhang, WD,期刊:Helvetica Chimica Acta, 页码:415-422 , 文章类型: Article,,卷期:2012年95-3]
- A systematic phytochemical investigation on Abies forrestii afforded two new and 20 known compounds. Abieseconordines A and B (1 and 2) are the first two examples of norditerpenes with a novel 18-nor-5,10?:?9,10-disecoab...
- Exaltone (R) (=Cyclopentadecanone) from Isomuscone (R) (=Cyclohexadecanone), a One-C-Atom Ring-Contraction Methodology via a Stereospecific Favorskii Rearrangement: Regioselective Application to (-)-(R)-Muscone
[作者:Chapuis, C; Robvieux, F; Cantatore, C; Saint-Leger, C; Maggi, L,期刊:Helvetica Chimica Acta, 页码:428-447 , 文章类型: Review,,卷期:2012年95-3]
- Treatment of cyclohexadecanone (1g; with I2 (2.2 mol-euqiv.) and KOH in MeOH) furnished the unsaturated (Z)-ester 2g in 83% yield, via a stereospecific Favorskii rearrangement (Scheme 1). Further treatment with 3-chlorop...
- Facile One-Pot Synthesis of Monosubstituted 1-Aryl-1H-1,2,3-triazoles from Arylboronic Acids and Prop-2-ynoic Acid (=Propiolic Acid) or Calcium Acetylide (=Calcium Carbide) as Acetylene Source
[作者:Yang, Q; Jiang, YB; Kuang, CX,期刊:Helvetica Chimica Acta, 页码:448-454 , 文章类型: Article,,卷期:2012年95-3]
- The synthesis of monosubstituted 1-aryl-1H-1,2,3-triazoles was achieved in a one-pot reaction from arylboronic acids and prop-2-ynoic acid or calcium acetylide (=calcium carbide), respectively, as a source of acetylene, ...
- Preparation of Pseudo-Peptide Building Blocks with retro-Thioamide Bond Mediated via Thiocarbamoyl Meldrum's Acid
[作者:Janikowska, K; Makowiec, S; Rachon, J,期刊:Helvetica Chimica Acta, 页码:461-468 , 文章类型: Article,,卷期:2012年95-3]
- An easy and efficient synthesis of pseudo-tripeptide containing a thiomalonamide moiety was developed. Isothiocyanate derivatives of amino acids react smoothly with 2,2-dimethyl-1,3-dioxane-4,6-dione (Meldrum's acid) to ...
- Regioselective Arylation and Alkynylation of 2,3-Dibromo-1H-inden-1-one by Suzuki-Miyaura and Sonogashira Cross-Coupling Reactions
[作者:Khera, RA; Hussain, M; Hung, NT; Eleya, N; Feist, H; Villinger, A; Langer, P,期刊:Helvetica Chimica Acta, 页码:469-482 , 文章类型: Article,,卷期:2012年95-3]
- Suzuki?Miyaura reactions of 2,3-dibromo-1H-inden-1-one afforded a wide range of arylated 1H-inden-1-ones. Sonogashira cross-coupling reactions gave alkynylated indenones. The reactions proceeded with very good regioselec...
- Isocyanide-Based Five-Component Synthesis of 2-Aryl-2-(2,3,4,5-tetrahydro-2,4-dioxo-1H-1,5-benzodiazepin-3-yl)acetamides (=a-Aryl-2,3,4,5-tetrahydro-2,4-dioxo-1H-1,5-benzodiazepine-3-acetamides)
[作者:Akbarzadeh, R; Amanpour, T; Soorki, AA; Bazgir, A,期刊:Helvetica Chimica Acta, 页码:483-490 , 文章类型: Article,,卷期:2012年95-3]
- An efficient and simple method for the synthesis of new 2-aryl-2-(2,3,4,5-tetrahydro-2,4-dioxo-1H-1,5-benzodiazepin-3-yl)acetamides (=a-aryl-2,3,4,5-tetrahydro-2,4-dioxo-1H-1,5-benzodiazepine-3-acetamides) by a five-comp...
- 'Click Synthesis' of Some Novel O-Substituted Oximes Containing 1,2,3-Triazole-1,4-diyl Residues as New Analogs of beta-Adrenoceptor Antagonists
[作者:Rad, MNS; Behrouz, S; Karimitabar, F; Khalafi-Nezhad, A,期刊:Helvetica Chimica Acta, 页码:491-501 , 文章类型: Article,,卷期:2012年95-3]
- The click synthesis of some novel O-substituted oximes, 7a7t, which contain 1,2,3-triazolediyl residues, as new analogs of beta-adrenoceptor antagonists is described (Schemes 14). The synthesis of these compounds was ach...
- An Efficient One-Pot Synthesis of Substituted 1H-Naphtho[2,1-b]pyrans and 4H-1-Benzopyrans (=Chromenes) under Solvent-Free Microwave-Irradiation Conditions
[作者:Shekhar, AC; Kumar, AR; Sathaiah, G; Raju, K; Rao, PS; Sridhar, M; Narsaiah, B; Srinivas, PVSS; Sridhar, B,期刊:Helvetica Chimica Acta, 页码:502-508 , 文章类型: Article,,卷期:2012年95-3]
- A facile heterogeneous synthesis of 3-amino-1-aryl-1H-naphtho[2,1-b]pyran and 2-amino-4-aryl-4H-1-benzopyran derivatives 3 and 5, respectively, was carried out efficiently by one-pot three-component coupling of an aromat...
- Three New C19-Diterpenoid Alkaloids from Aconitum transsectum
[作者:Shen, Y; Ai, HL; Cao, TW; Wang, JJ; Zi, SH; Zhang, XM; Chen, JJ,期刊:Helvetica Chimica Acta, 页码:509-513 , 文章类型: Article,,卷期:2012年95-3]
- Three new C19-diterpenoid alkaloids, named aconitramines A (1), B (2), and C (3), were isolated from Aconitum transsectum. By UV, IR, 1D- and 2D-NMR, and MS analyses, their structures were elucidated as 18-methoxyvilmora...
- Synthesis of Some New 2-Oxo-N-[(10H-phenothiazin-10-yl)alkyl] Derivatives of Azetidine-1-carboxamides
[作者:Sharma, R; Samadhiya, P; Srivastava, SD; Srivastava, SK,期刊:Helvetica Chimica Acta, 页码:514-521 , 文章类型: Article,,卷期:2012年95-3]
- The synthesis of a new series of 4-aryl-3-chloro-2-oxo-N-[3-(10H-phenothiazin-10-yl)propyl]azetidine-1-carboxamides, 4a4m, is described. Phenothiazine on reaction with Cl(CH2)3Br at room temperature gave 10-(3-chloroprop...
- Polyhydroxylated Steroids from the South China Sea Gorgonian Anthogorgia sp.
[作者:Sun, P; Xu, YY; Liu, TF; Tang, H; Yi, YH; Krohn, K; Li, L; Zhang, W,期刊:Helvetica Chimica Acta, 页码:522-527 , 文章类型: Article,,卷期:2012年95-3]
- Four new polyhydroxylated steroids, namely anthogorgsteroids AD (14), were isolated from the South China Sea gorgonian Anthogorgia sp. The structures of these compounds were elucidated by detailed spectroscopic analyses ...
- Efficient Synthesis of Novel Coumarin-3-carboxamides (=2-Oxo-2H-1-benzopyran-3-carboxamides) Containing Lipophilic Spacers
[作者:Balalaie, S; Bigdeli, MA; Sheikhhosseini, E; Habibi, A; Moghadam, HP; Naderi, M,期刊:Helvetica Chimica Acta, 页码:528-535 , 文章类型: Article,,卷期:2012年95-3]
- The novel coumarin-3-carboxamides (=2-oxo-2H-1-benzopyran-3-carboxamides) 5a5g containing lipophilic spacers were synthesized through the Ugi-four-component reaction (Scheme 1). The reactions of aromatic aldehydes 1, 4,4...
|