دانلود مقالات ISI درباره Diastereoselectivity + ترجمه فارسی

Influence of the solvent in low temperature glycosylations with O-(2,3,5,6-tetra-O-benzyl-β-d-galactofuranosyl) trichloroacetimidate for 1,2-cis α-d-galactofuranosylation

Keywords: Glycosylation; Trichloroacetimidate; 1,2-Cis; Galactofuranose; Solvents effects; Diastereoselectivity;

دانلود رایگان متن کامل مقاله ISI 8 صفحه سال انتشار : 2011 سفارش ترجمه

FeCl3·6H2O-catalyzed synthesis of substituted cis-2,6-tetrahydropyrans from ζ-hydroxy allylic derivatives

Keywords: Tetrahydropyran; Diastereoselectivity; Epimerization; Heterocyclization; Iron trichloride;

دانلود رایگان متن کامل مقاله ISI 10 صفحه سال انتشار : 2011 سفارش ترجمه

Design, synthesis and pharmacological evaluation of spirocyclic σ1 receptor ligands with exocyclic amino moiety (increased distance 1)

Keywords: σ1 Receptor ligands; σ1 Pharmacophore models; Spirocyclic σ1 ligands; Diastereoselectivity; Conformational analysis; Structure–σ1 affinity relationships; X-ray

دانلود رایگان متن کامل مقاله ISI 11 صفحه سال انتشار : 2011 سفارش ترجمه

Bis-Lewis acids-catalyzed highly diastereoselective one-pot reductive dehydroxylation of chiral N,O-acetals

Keywords: Cooperative effects; Diastereoselectivity; Lewis acids; Asymmetric synthesis; Heterocycles;

دانلود رایگان متن کامل مقاله ISI 4 صفحه سال انتشار : 2010 سفارش ترجمه

Synthesis of (−)-pinidinone

Keywords: Palladium; Natural products; Heterogenous catalysis; Piperidines; Diastereoselectivity;

دانلود رایگان متن کامل مقاله ISI 4 صفحه سال انتشار : 2010 سفارش ترجمه

Synthesis of eight-membered iminocyclitols from d-glucose

Keywords: Baylis-Hillman reaction; Conjugate addition; Iminosugars; Diastereoselectivity;

دانلود رایگان متن کامل مقاله ISI 5 صفحه سال انتشار : 2010 سفارش ترجمه

On the scope of Pd-catalyzed carboamination reactions-synthesis of 2,4-disubstituted pyrrolidines and 2-substituted piperidines and morpholines

Keywords: Carboamination; Diastereoselectivity; Morpholine; Piperidine; Pyrrolidine;

دانلود رایگان متن کامل مقاله ISI 5 صفحه سال انتشار : 2010 سفارش ترجمه

Diastereoselective lithium salt-assisted 1,3-dipolar cycloaddition of azomethine ylides to the fullerene C60

Keywords: Fulleroproline; Lithium salt-assisted 1,3-dipolar cycloaddition; Azomethine ylide; Diastereoselectivity;

دانلود رایگان متن کامل مقاله ISI 5 صفحه سال انتشار : 2010 سفارش ترجمه

Synthesis and structure of an air-stable organoantimony complex and its use as a catalyst for direct diastereoselective Mannich reactions in water

Keywords: Organoantimony; Lewis acid; Direct Mannich reaction; Diastereoselectivity; Catalyst

دانلود رایگان متن کامل مقاله ISI 6 صفحه سال انتشار : 2010 سفارش ترجمه

Formal synthesis of (+)-varitriol. Application of Pd(II)/Cu(II)-catalysed bicyclisation of unsaturated polyols

Keywords: Palladium(II)-catalysis; Bicyclisation; Diastereoselectivity; Natural products; Varitriol;

دانلود رایگان متن کامل مقاله ISI 6 صفحه سال انتشار : 2010 سفارش ترجمه

Diastereoselective gas-phase ion/molecule reactions of ethanolamine neurotransmitter/amido[4]resorcinarene adducts

Keywords: Diastereoselectivity; Host/guest complexes; Kinetics; FT-ICR mass spectrometry; Molecular dynamics;

دانلود رایگان متن کامل مقاله ISI 6 صفحه سال انتشار : 2010 سفارش ترجمه

Large-scale separation of silybin diastereoisomers using lipases

Keywords: Silymarin; Silibinin; Silybin A; Lipase; Novozym 435; Diastereoselectivity

دانلود رایگان متن کامل مقاله ISI 7 صفحه سال انتشار : 2010 سفارش ترجمه

Synthesis of different types of valerolactams starting from 2,5-dihydrooxazoles

Keywords: Heterocycles; Imines; Valerolactams; Addition reactions; Diastereoselectivity;

دانلود رایگان متن کامل مقاله ISI 9 صفحه سال انتشار : 2010 سفارش ترجمه

Chiral amines in the diastereoselective Mannich-related multicomponent synthesis of diarylmethylamines, 1,2-diarylethylamines, and β-arylethylamines

Keywords: Multicomponent reactions; Organozinc compounds; Diastereoselectivity; Cobalt; Zinc;

دانلود رایگان متن کامل مقاله ISI 10 صفحه سال انتشار : 2010 سفارش ترجمه

Investigation of alkyl metal intermediate formation in the rhodium-catalyzed hydroformylation: Experimental and theoretical approaches

Keywords: Unmodified Rh catalysts; Hydroformylation; Deuterioformylation; Density functional theory; B3P86/6-31G*; Isomeric alkyl rhodium intermediates; Regioselectivity; Diastereoselectivity

دانلود رایگان متن کامل مقاله ISI 11 صفحه سال انتشار : 2010 سفارش ترجمه

Synthesis and structural analysis of tetra- and pentacyclic lactams derived from regioisomeric tetrahydroisoquinoline diamines

Keywords: Lactams; Domino reactions; Diastereoselectivity; NMR spectroscopy; Mass spectrometry;

دانلود رایگان متن کامل مقاله ISI 11 صفحه سال انتشار : 2010 سفارش ترجمه

Synthesis of 1,3-diketones through ring-opening of ketoketene dimer β-lactones

Keywords: 1,3-Diketones; Ketoketene dimers; β-Lactones; Organolithiums; Alkyllithiums; Diastereoselectivity;

دانلود رایگان متن کامل مقاله ISI 4 صفحه سال انتشار : 2009 سفارش ترجمه

Hydrotrispyrazolylborate-copper complexes as catalysts for the styrene cyclopropanation reaction with ethyl diazoacetate under homogeneous and heterogeneous conditions

Keywords: Hydrotrispyrazolylborate; Copper; Styrene cyclopropanation; Diastereoselectivity

دانلود رایگان متن کامل مقاله ISI 4 صفحه سال انتشار : 2009 سفارش ترجمه

Diastereodifferentiating photodimerization of alkyl 2-naphthoates with chiral auxiliaries

Keywords: Chiral auxiliary strategy; Photodimerization; Cubane-like photodimer; Diastereoselectivity;

دانلود رایگان متن کامل مقاله ISI 4 صفحه سال انتشار : 2009 سفارش ترجمه

Biocatalytic application of nitrilases from Fusarium solani O1 and Aspergillus niger K10

Keywords: Amino nitriles; Nitrilase; Substrate specificity; Enantioselectivity; Diastereoselectivity

دانلود رایگان متن کامل مقاله ISI 5 صفحه سال انتشار : 2009 سفارش ترجمه

Effect of the hybridization of the hetero-atom present at the tether on the selectivity of the (3,4)ene cyclization: A theoretical study

Keywords: Ene cyclization; Diastereoselectivity; DFT; Transition structure;

دانلود رایگان متن کامل مقاله ISI 5 صفحه سال انتشار : 2009 سفارش ترجمه

Asymmetric hydrogenation of isophorone in the presence of (S)-proline: Revival of a 20 years old reaction

Keywords: Asymmetric hydrogenation; Heterogeneous catalysis; Pd catalyst; α,β-Unsaturated ketones; Isophorone; Proline chiral auxiliary; Enantioselectivity; Diastereoselectivity

دانلود رایگان متن کامل مقاله ISI 6 صفحه سال انتشار : 2009 سفارش ترجمه

Addition of amines and carbon nucleophiles to vinyl sulfone-modified 6-deoxy-hex-3-enopyranoside: a case of nucleophile dependent diastereoselectivity

Keywords: Vinyl sulfone; Modified carbohydrate; Michael addition; Aminosugar; Branched-chain sugar; Diastereoselectivity;

دانلود رایگان متن کامل مقاله ISI 6 صفحه سال انتشار : 2009 سفارش ترجمه

A facile stereoselective synthesis of 2-perfluoroalkyl-3a,4,5,6-tetrahydroimidazo[1,5-b]isoxazoles

Keywords: Methyl 2-perfluoroalkynoates; Imidazoisoxazoles; 1,3-Dipolar cycloaddition; Diastereoselectivity; Regioselectivity

دانلود رایگان متن کامل مقاله ISI 6 صفحه سال انتشار : 2009 سفارش ترجمه

High-temperature reaction of a Co2(CO)6-complexed propargyl cation

Keywords: Cobalt; Propargyl radical; Diastereoselectivity

دانلود رایگان متن کامل مقاله ISI 10 صفحه سال انتشار : 2009 سفارش ترجمه

Michael addition of nitroalkanes to nonactivated α,β-unsaturated δ-thiolactams: reactivity, diastereoselectivity, and comparison to α,β-unsaturated δ-lactams

Keywords: Michael addition; Nitroalkanes; Reactivity; Diastereoselectivity; α,β-Unsaturated δ-(thio)lactams; 5,6-Dihydro-1H-pyridine-2-(thi)one; 4-Nitroalkylpiperidine-2-(thi)ones; FMO-theory;

دانلود رایگان متن کامل مقاله ISI 13 صفحه سال انتشار : 2009 سفارش ترجمه

Diastereoselective formation of a complex with an atropisomeric 4,4′-biquinazoline ligand: The solid-state structure of cis-bis(4,4′-biquinazoline)dichloridoiridium(III) hexafluoridophosphate

Keywords: 4,4′-Biquinazoline; Chirality; Iridium; Diastereoselectivity; Crystal structure;

دانلود رایگان متن کامل مقاله ISI 4 صفحه سال انتشار : 2008 سفارش ترجمه

α-Amino acids as acid components in the Passerini reaction: influence of N-protection on the yield and stereoselectivity

Keywords: Passerini reaction; Isocyanides; Diastereoselectivity;

دانلود رایگان متن کامل مقاله ISI 4 صفحه سال انتشار : 2008 سفارش ترجمه

Ionic liquid promoted interrupted Feist-Benary reaction with high diastereoselectivity

Keywords: Ionic liquid; Interrupted Feist-Benary reaction; Dihydrofurans; Furans; Diastereoselectivity;

دانلود رایگان متن کامل مقاله ISI 5 صفحه سال انتشار : 2008 سفارش ترجمه

A Sakurai-Prins-Ritter reaction sequence for the diastereoselective synthesis of 4-amidotetrahydropyrans catalyzed by bismuth triflate

Keywords: Tetrahydropyrans; Diastereoselectivity; Aldehydes; Allyltrimethylsilane; Bi(OTf)3·4H2O; Sakurai-Prins-Ritter;

دانلود رایگان متن کامل مقاله ISI 5 صفحه سال انتشار : 2008 سفارش ترجمه

Synthesis of optically enriched 1,2-aminoalcohols by [2,3]-Wittig rearrangements of 3-aza-allylic alcohol derivatives

Keywords: 1,2-Aminoalcohols; Enamides; [2,3]-Wittig rearrangement; Diastereoselectivity; Chirality transfer;

دانلود رایگان متن کامل مقاله ISI 5 صفحه سال انتشار : 2008 سفارش ترجمه

A facile synthesis of novel pyrrolizidines under classical and ultrasonic conditions

Keywords: Pyrrolizidine; Regioselectivity; Diastereoselectivity; Ultrasonic irradiation; 1, 3-Dipolar cycloaddition;

دانلود رایگان متن کامل مقاله ISI 5 صفحه سال انتشار : 2008 سفارش ترجمه

Effect of the heteroatomic substituent on the pi-facial diastereoselectivity in Lewis acid catalyzed carbonyl ene reaction: A theoretical study

Keywords: Diastereoselectivity; Ene reaction; Transition structures;

دانلود رایگان متن کامل مقاله ISI 6 صفحه سال انتشار : 2008 سفارش ترجمه

Synthesis and optical properties of a poly(2′,5′-dioctyloxy-4,4′,4″- terphenylenevinylene) with high content of (Z) vinylene units

Keywords: Cross-coupling; Boron; Polymerization; PPV; Diastereoselectivity

دانلود رایگان متن کامل مقاله ISI 6 صفحه سال انتشار : 2008 سفارش ترجمه

Stereochemical studies on the novel monoamine oxidase B substrates (1R,6S)- and (1S,6R)-3-methyl-6-phenyl-3-aza-bicyclo[4.1.0]heptane

Keywords: Monoamine oxidase B; Cyclopropyl analog of MPTP; Enantioselectivity; Diastereoselectivity

دانلود رایگان متن کامل مقاله ISI 8 صفحه سال انتشار : 2008 سفارش ترجمه

Regio- and diastereoselective conjugate addition of Grignard reagents to aryl substituted α,β-unsaturated carbonyl compounds derived from Oppolzer's sultam

Keywords: α,β-Unsaturated carbonyl compound; Grignard reagent; Conjugate addition; Regioselectivity; Diastereoselectivity;

دانلود رایگان متن کامل مقاله ISI 8 صفحه سال انتشار : 2008 سفارش ترجمه

Diastereoselective synthesis of cyclic 1,3-aminoalcohols bearing CF3(CCl3)-groups

Keywords: Diastereoselectivity; Aldol reaction; Reduction; Cyclic imines; Methyl trifluoropyruvate; Azaheterocycles; Trihalomethylcarbinols

دانلود رایگان متن کامل مقاله ISI 8 صفحه سال انتشار : 2008 سفارش ترجمه

An approach toward the total synthesis of subergorgic acid

Keywords: Subergorgic acid; Ireland-Claisen rearrangement; Facial selectivity; Diastereoselectivity;

دانلود رایگان متن کامل مقاله ISI 9 صفحه سال انتشار : 2008 سفارش ترجمه

Stereoselective synthesis and functionalization of N-alkyl-β-lactams

Keywords: β-Lactams; Carbanions; Diastereoselectivity; Functionalization;

دانلود رایگان متن کامل مقاله ISI 9 صفحه سال انتشار : 2008 سفارش ترجمه

Studies on the origin of cis-diastereoselectivity of the titanium-mediated cyclopropanation of carboxylic esters with Grignard reagents. Stereochemistry of the intramolecular cyclization of β-metalloketones

Keywords: Diastereoselectivity; Cyclopropanols; Titanacyclopropanes; Ate complexes;

دانلود رایگان متن کامل مقاله ISI 12 صفحه سال انتشار : 2008 سفارش ترجمه

Diastereoselective synthesis of polyfunctionalized piperidines as precursors of dopamine transporter imaging agents

Keywords: Diastereoselectivity; Polyfunctionalization; Tropanes; Piperidines;

دانلود رایگان متن کامل مقاله ISI 4 صفحه سال انتشار : 2007 سفارش ترجمه

Rare-earth metal triflates catalyzed three-component coupling of aldehydes, ketones or ketoesters and benzyl carbamate: An efficient one-pot stereoselective synthesis of Cbz-protected β-amino carbonyl compounds

Keywords: Sc(OTf)3; Yb(OTf)3; Cbz-protected β-amino ketone; Three-component coupling; Diastereoselectivity

دانلود رایگان متن کامل مقاله ISI 4 صفحه سال انتشار : 2007 سفارش ترجمه

Regio- and diastereoselective synthesis of (3,4,8,9)-dibenzo-2,7-dioxa-5,10-diaza[4.4.4] propellanes from 4-substituted 1,2-cyclohexanediones and o-aminophenols, a computational approach to regioselectivity prediction

Keywords: [4.4.4] Propellanes; 1,2-Cyclohexanediones; Regioselectivity; Diastereoselectivity; PM3 calculations;

دانلود رایگان متن کامل مقاله ISI 4 صفحه سال انتشار : 2007 سفارش ترجمه

A new access to ring-fused cyclopropanols through samarium diiodide-induced 3-exo-trig-cyclisations

Keywords: Cyclisations; Cyclopropanols; Diastereoselectivity; Radicals; Samarium;

دانلود رایگان متن کامل مقاله ISI 4 صفحه سال انتشار : 2007 سفارش ترجمه

1,5-Remote stereocontrol using allylgermanes

Keywords: Remote stereocontrol; Allylmetal; Organogermanium; Diastereoselectivity;

دانلود رایگان متن کامل مقاله ISI 4 صفحه سال انتشار : 2007 سفارش ترجمه

The catalytic tandem oxidation/benzilic ester rearrangement (BER): insights into reaction mechanism and stereoselectivity

Keywords: Benzilic acid rearrangment; Benzilic ester rearrangment; Isotopic label; Regioselectivity; Diastereoselectivity;

دانلود رایگان متن کامل مقاله ISI 4 صفحه سال انتشار : 2007 سفارش ترجمه

Stereoselective synthesis of (R)-(+)-1-methoxyspirobrassinin, (2R,3R)-(−)-1-methoxyspirobrassinol methyl ether and their enantiomers or diastereoisomers

Keywords: Indoles; Phytoalexins; Menthol; Diastereoselectivity;

دانلود رایگان متن کامل مقاله ISI 5 صفحه سال انتشار : 2007 سفارش ترجمه

Critical solvent effect on the chiral recognition of a catalytic species by a chiral substrate

Keywords: Cyclocarbonylation; Monoterpenes; Palladium; Solvent effects; Diastereoselectivity

دانلود رایگان متن کامل مقاله ISI 5 صفحه سال انتشار : 2007 سفارش ترجمه

From chiral and prochiral N-allylpyrroles to stereodefined pyrrole fused architectures: A particular application of the rhodium-catalyzed hydroformylation

Keywords: Hydroformylation; Synthesis; Chiral indolizines; Diastereoselectivity

دانلود رایگان متن کامل مقاله ISI 5 صفحه سال انتشار : 2007 سفارش ترجمه

Diastereoselectivity in the Staudinger reaction: a useful probe for investigation of nonthermal microwave effects

Keywords: Diastereoselectivity; Imine; Ketene; β-Lactam; Microwave; Nonthermal effect; Staudinger reaction; Stereoselectivity; Temperature;

دانلود رایگان متن کامل مقاله ISI 6 صفحه سال انتشار : 2007 سفارش ترجمه