Publication

Analysis of multiplets in two-dimensional NMR spectra by topological classification: applications to vinblastine and cyclosporin A

Geoffrey Bodenhausen
1988
Journal Articles

Abstract

A recently developed approach for the anal. of cross-peak multiplets was applied to 2-dimensional correlation spectra of the binary alkaloid vinblastine and the cyclic undecapeptide cyclosporin A. The exptl. multiplet patterns are encoded in a manner that depends on the topol. of the coupling network but not on the values of the coupling consts. Multiplets that are expected to occur for various possible coupling networks are similarly encoded in a library to allow comparison with exptl. multiplets. The program is called MARCO POLO (Multiplet Anal. by Redn. of Cross peaks and Ordering of Patterns in an Overdetd. Library Organization). The outcome of this type of automated anal. is discussed in detail, with particular emphasis on remaining ambiguities. [on SciFinder (R)]

Official source

https://infoscience.epfl.ch/entities/publication/44effbf1-8ef9-40ed-aaf5-c11a0178a3f1

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Geoffrey Bodenhausen
1988
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/44effbf1-8ef9-40ed-aaf5-c11a0178a3f1

About this result

Related concepts (21)

Two-dimensional nuclear magnetic resonance spectroscopy

Two-dimensional nuclear magnetic resonance spectroscopy (2D NMR) is a set of nuclear magnetic resonance spectroscopy (NMR) methods which give data plotted in a space defined by two frequency axes rather than one. Types of 2D NMR include correlation spectroscopy (COSY), J-spectroscopy, exchange spectroscopy (EXSY), and nuclear Overhauser effect spectroscopy (NOESY). Two-dimensional NMR spectra provide more information about a molecule than one-dimensional NMR spectra and are especially useful in determining the structure of a molecule, particularly for molecules that are too complicated to work with using one-dimensional NMR.

Nuclear magnetic resonance spectroscopy

Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy or magnetic resonance spectroscopy (MRS), is a spectroscopic technique to observe local magnetic fields around atomic nuclei. This spectroscopy is based on the measurement of absorption of electromagnetic radiations in the radio frequency region from roughly 4 to 900 MHz. Absorption of radio waves in the presence of magnetic field is accompanied by a special type of nuclear transition, and for this reason, such type of spectroscopy is known as Nuclear Magnetic Resonance Spectroscopy.

Nuclear magnetic resonance

Nuclear magnetic resonance (NMR) is a physical phenomenon in which nuclei in a strong constant magnetic field are perturbed by a weak oscillating magnetic field (in the near field) and respond by producing an electromagnetic signal with a frequency characteristic of the magnetic field at the nucleus. This process occurs near resonance, when the oscillation frequency matches the intrinsic frequency of the nuclei, which depends on the strength of the static magnetic field, the chemical environment, and the magnetic properties of the isotope involved; in practical applications with static magnetic fields up to ca.

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Analysis of multiplets in two-dimensional NMR spectra by topological classification: applications to vinblastine and cyclosporin A

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