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Steric Inhibition of the Rotation of the Phenyl Groups in 2,6-Dimethyl-1-phenylcyclohexanol and Dendrocrepine Detected by Means of Carbon-13 Nuclear Magnetic Resonance by Edward Leete; Robert M. Riddle is a Chemistry article available to read on EtoBox.
What is Steric Inhibition of the Rotation of the Phenyl Groups in 2,6-Dimethyl-1-phenylcyclohexanol and Dendrocrepine Detected by Means of Carbon-13 Nuclear Magnetic Resonance about?
In the course of an investigation on the biosynthesis of the alkaloids of the orchid ## Dendmbiwn orepidatwn Lindl. we examined the 13C NMR spectrum of dendrocrepine (A).2'3 The chemical shifts (ppm from Me4Si in CDC13) indicated on formula 1, were assigned by offresonance decoupling, and by comparison with the spectra of indolizidine and methylpiperidines. To our surprise, the phenyl groups gave rise to six resonances. An examination of space-filling models indicated that the non-equivalence of the two ortho and two meta positions could be due to lack of rotation of the phenyl groups. We have thus examined the 206.7 i==()
Who reads Steric Inhibition of the Rotation of the Phenyl Groups in 2,6-Dimethyl-1-phenylcyclohexanol and Dendrocrepine Detected by Means of Carbon-13 Nuclear Magnetic Resonance?
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- Author
- Edward Leete; Robert M. Riddle
- Publisher
- Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0040-4039)
- Published
- 1978
- Language
- EN
- Field
- Chemistry (Physical Sciences)