Search results for "NMR chemical shifts"

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Complete 1H and 13C NMR assignments of clerodane diterpenoids of Salvia splendens.

2006

Unambiguous and complete assignments of 1H and 13C NMR chemical shifts for five clerodane diterpenes, four of them isolated from Salvia splendens (salviarin, splendidin and splenolides A and B) and one obtained by acetylation of splenolide A, are presented. The assignments are based on 2D shift-correlated [1H,1H–COSY, 1H,13C-gHSQC–1J(C,H) and 1H,13C-gHMBC-nJ(C,H) (n = 2 and 3)] and nuclear Overhauser effect (NOE) experiments. The conformation of the rings of these compounds is supported by the 3J(H,H) values and NOE results. Copyright © 2006 John Wiley & Sons, Ltd.

Carbon IsotopesMagnetic Resonance SpectroscopybiologyStereochemistryChemistryChemical shiftAcetylationGeneral ChemistryNuclear Overhauser effectCarbon-13 NMRSalviabiology.organism_classificationDiterpenes ClerodaneUnambiguous and complete assignments of 1H and 13C NMR chemical shifts for five clerodane diterpenes four of them isolated from Salvia splendens (salviarin splendidin and splenolides A and B) and one obtained by acetylation of splenolide A are presented. The assignments are based on 2D shiftcorrelated [1H1H–COSY 1H13C-gHSQC–1J(CH) and 1H13C-gHMBC-nJ(CH) (n = 2 and 3)] and nuclear Overhauser effect (NOE) experiments. The conformation of the rings of these compounds is supported by the 3J(HH) values and NOE results. Copyright  2006 John Wiley & Sons LtdClerodane DiterpenesProton NMRGeneral Materials ScienceSalviaHydrogenMagnetic resonance in chemistry : MRC
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A New Entry to the Substituted Pyrrolo[3,2-c]quinoline Derivatives of Biological Interest by Intramolecular Heteroannulation of Internal Imines.

2004

New 1,3,4-substituted pyrrolo[3,2-c]quinoline derivatives were synthesised in good yields by oxidative heteroannulation of internal imines starting from easily prepared substituted 5-(2-aminophenyl)pyrroles and commercially available aryl and heteroaryl aldehydes. The reaction occurs as a one-pot process involving an intramolecular acid catalysed reaction.

NMR chemical shiftsArylOrganic ChemistryQuinolineGeneral MedicineBiochemistryInternal iminesCombinatorial chemistry2-c]quinoline derivativeschemistry.chemical_compoundchemistryIntramolecular forceDrug DiscoveryOrganic chemistryPyrrolo[3Intramolecular heteroannulationChemInform
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