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Step Synthesis (step + synthesis)
Selected AbstractsOne Step Synthesis of Chiral Olefins via Asymmetric Diamination and their Applications as Ligands for Rhodium(I)-Catalyzed 1,4-AdditionsADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 4 2010Xichao Hu Abstract A variety of acyclic chiral dienes were synthesized in a single step via palladium(0)-catalyzed asymmetric allylic and homoallylic CH diamination of terminal olefins. The applications of such simple dienes as steering ligands for rhodium(I)-catalyzed asymmetric 1,4-additions afforded the corresponding adducts in excellent yields and up to 85% ee. [source] ChemInform Abstract: An Efficient Single Step Synthesis of Pyridazine, Pyrazolo[5,1-c]-1,2,4-triazine, 1,2,4-Triazolo[5,1-c]-1,2,4-triazine and 1,2,4-Triazino[4,3-a]benzimidazole Derivatives.CHEMINFORM, Issue 29 2009Mohamed R. Shaaban Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: One Step Synthesis of 14-Alkyl- or Aryl-14H-dibenzo[a,j]xanthenes Using Sodium Hydrogen Sulfate as Catalyst.CHEMINFORM, Issue 35 2008Zahed Karimi-Joberi Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] New One Step Synthesis of Crown Compounds Containing a 1,3,4-Thiadiazole Moiety.CHEMINFORM, Issue 44 2004Fouad Bentiss No abstract is available for this article. [source] One Step Synthesis of Novel Antimicrobial 2-Hydroxy Diaryl Ethers Through Domestic Microwave Heating.CHEMINFORM, Issue 29 2004Sanjay Kumar Abstract For Abstract see ChemInform Abstract in Full Text. [source] A Convenient Single Step Synthesis of p-Thiomethylmethylcalixarenes and Metal Ion Extraction Studies.CHEMINFORM, Issue 1 2004Satish Kumar Abstract For Abstract see ChemInform Abstract in Full Text. [source] A One-Pot, Two Step Synthesis of 2,2-Disubstituted 1-Nitroalkenes.CHEMINFORM, Issue 42 2003Yeong-Jiunn Jang Abstract For Abstract see ChemInform Abstract in Full Text. [source] One Step Synthesis of Imidazole and Benzimidazole Acycloaromatic Nucleoside Analogues.CHEMINFORM, Issue 19 2003A. Khalafi-Nezhad Abstract For Abstract see ChemInform Abstract in Full Text. [source] ChemInform Abstract: A Convenient One-Pot One Step Synthesis of p-Nitrocalixarenes via Ipsonitration.CHEMINFORM, Issue 35 2001Satish Kumar Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] A Facile Synthesis of N -Aryl Substituted PiperidonesCHINESE JOURNAL OF CHEMISTRY, Issue 10 2009Qian Geng Abstract A general and efficient procedure for the synthesis of N -aryl-substituted 4-piperidones was developed. The two step syntheses proceeded with an overall yield of 60%-83% using L -proline as the ligand for the Cu(I)-catalyzed Ullmann amination followed by subsequent hydrolysis of resulting ketals. [source] New one step synthesis of 3,5-disubstituted 1,2,4-oxadiazolesJOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 6 2007Moha Outirite Disubstituted 1,2,4-oxadiazoles have been synthesized in good yields and good purity in one pot procedure by reaction of aromatic nitriles, hydroxylamine hydrochloride and sodium carbonate in ethylene glycol under heating at 195°C. The structures of different 1,2,4-oxadiazoles obtained were confirmed by 1H, 13C NMR and mass spectroscopy. [source] Synthesis of novel aminothiopyran dicarboxylatesJOURNAL OF HETEROCYCLIC CHEMISTRY, Issue 6 2000Bruce L. Finkelstein A one step synthesis of previously unknown aminothiopyran dicarboxylates from readily available starting materials is described. The yields range from 33,74%. [source] Synthesis of doubly 13C-labelled antalarmin isotopomers for pharmacokinetic studiesJOURNAL OF LABELLED COMPOUNDS AND RADIOPHARMACEUTICALS, Issue 8 2002Elisabeth Greiner Abstract Antalarmin (butyl-ethyl-[2,5,6-trimethyl-7-(2,4,6-trimethyl-phenyl)-7H -pyrrolo[2,3- d]pyrimidin-4-yl]-amine) was doubly labelled with carbon-13. The synthesized butyl-[13C2]ethyl-[2,5,6-trimethyl-7-(2,4,6-trimethyl-phenyl)-7H -pyrrolo[2,3- d]pyrimidin-4-yl]-amine (1) and butyl-ethyl-[2- 13C]-[2,5,6-trimethyl-7-(2,4,6-trimethyl-phenyl)-7H -pyrrolo[2,3- d]-[2- 13C] pyrimidin-4-yl]-amine, (2) were prepared for use as substrates for pharmacokinetic studies. These compounds were obtained in fair overall yield in a 5 and 6 step synthesis (20,24.5%, respectively) and high isotopic purity (about 99 at% 13C). Copyright © 2002 John Wiley & Sons, Ltd. [source] Monolithic poly(glycidyl methacrylate- co -divinylbenzene) capillary columns functionalized to strong anion exchangers for nucleotide and oligonucleotide separationJOURNAL OF SEPARATION SCIENCE, JSS, Issue 16 2006Wolfgang Wieder Abstract In the present work, poly(glycidyl methacrylate- co -divinylbenzene) monoliths were synthesized and further derivatized to obtain strong anion exchange supports. Capillary monoliths (65×0.2 mm id) were prepared in situ by copolymerization of glycidyl methacrylate and divinylbenzene, employing 1-decanol and tetrahydrofuran as porogens. The free epoxy groups were derivatized in a two step synthesis to obtain quaternary ammonium functionalities. On testing the pressure stability of the synthesized monolith, a highly linear dependence between flow rate and pressure drop was obtained, indicating the high stability of the material even at high flow rates. The morphology of the copolymer was investigated by scanning electron microscopy. Mercury intrusion porosimetry showed a narrow pore size distribution, having a maximum at 439 nm. On recording a van Deemter plot the number of theoretical plates per meter was found to be 59 324. The produced strong anion exchange monoliths turned out to be highly suitable for the separation of nucleotides and oligonucleotides. [source] Total Synthesis of (+)- trans -Dihydronarciclasine by a Catalytic Enantioselective Regiodivergent Nitroso Diels,Alder ReactionCHEMISTRY - A EUROPEAN JOURNAL, Issue 21 2008Chandan Kumar Jana A novel approach to enantiomerically pure (+)- trans -dihydronarciclasine (1), a biologically active natural product of the Amaryllidaceae group, uses a catalytic enantioselective regiodivergent nitroso Diels,Alder reaction as the key step. Compound 1 is prepared in a 17-step synthesis in 5.6,% overall yield. [source] | ||||||||||||||||||||||