The reaction of CD: with C2H6 has been reinvestigated by the Fourier-transform ion cyclotron resonance technique. It proceeds, in addition to the previously observed "hydride transfer" pathway resulting in the C,H: ion, by at least two other channels. "Methylene transfer" results in the isotopic C2H
Quantitation of methadone enantiomers in humans using stable isotope-labeled [2H3]-, [2H5]-, and [2H8]methadone
β Scribed by K. Nakamura; D. L. Hachey; M. J. Kreek; C. S. Irving; P. D. Klein
- Publisher
- John Wiley and Sons
- Year
- 1982
- Tongue
- English
- Weight
- 535 KB
- Volume
- 71
- Category
- Article
- ISSN
- 0022-3549
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Secondary isotope effects were examined in the loss of methyl from the molecular ions of C,D,OC,H, and CD,CH,OC,H, for ion source processes and collisional activation (CA) processes. In the ion source loss of CH, was slightly favored over loss of CD, , but in CA the CH, loss was favored to a much la
## Abstract A synthetic route to isotopically labelled forms of the tropane alkaloid hyoscyamine, including (__RS__)β[3β², 3β²,β^2^H~2~]β (**2a**) and (__RS__)β[1β²β^13^C, 3β², 3β²,β^2^H~2~]β (**2b**) hyoscyamines, involving the reaction between phenylacetyl tropine and formaldehyde is described. The is
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