Can I read Carbon-13 NMR studies in the polycyclic hydrocarbon series. A new method for the identification of carbons α to a carbonyl group. Complete assignment of the13C NMR spectra of severalcis-decalins,cis-decalones,cis-hydrindanones and 13α,14α- and 13β,14β-steroids on EtoBox?

Carbon-13 NMR studies in the polycyclic hydrocarbon series. A new method for the identification of carbons α to a carbonyl group. Complete assignment of the13C NMR spectra of severalcis-decalins,cis-decalones,cis-hydrindanones and 13α,14α- and 13β,14β-steroids by J. C. Gramain; J. C. Quirion is a Chemistry article available to read on EtoBox.

What is Carbon-13 NMR studies in the polycyclic hydrocarbon series. A new method for the identification of carbons α to a carbonyl group. Complete assignment of the13C NMR spectra of severalcis-decalins,cis-decalones,cis-hydrindanones and 13α,14α- and 13β,14β-steroids about?

A new 13C N M R method based on solvent effects allows the identification of carbon atoms a to a carbonyl group. With a simple change in solvent from CDCl, to CDC1,-dioxane (1:4), the -C absorption for all carbons except those a to the carbonyl group in the compounds under study were displaced to lower field by 0.2-0.5 ppm. The a-carbon absorptions either remained unchanged or were shited to higher field by cu 0.1 ppm. The validity of the method has been checked on compounds with fully assigned -C NMR spectra (puns-decalones and steroids). Moreover, no modification of these solvent shifts due to the presence of other common functional groups (double bond or OH) was observed. This new technique, together with existing 'classical' methods ('off-resonance' spectra, substituent effects) enables the complete interpretation of the 13C N M R spectra of five cis-decalins and cis-decalones to be made. The spectra of three cis-hydrindanones which have not been previously described were also fully interpreted. The same method allows the complete spectral assignment of the uC N M R spectra of six steroids of unnatural configuration in the 13a,14a-and 13f3,14fi-androstane series, for which no d

Who reads Carbon-13 NMR studies in the polycyclic hydrocarbon series. A new method for the identification of carbons α to a carbonyl group. Complete assignment of the13C NMR spectra of severalcis-decalins,cis-decalones,cis-hydrindanones and 13α,14α- and 13β,14β-steroids?

Author

J. C. Gramain; J. C. Quirion

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; John Wiley and Sons Ltd; Wiley (ISSN 0749-1581)

Published

1986

Language

EN

Field

Chemistry (Physical Sciences)