The electron impact induced fragmentations of some 7-alkyl-3-oxabicyclo[3.3.1]nonanes |
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Authors: | JA Peters B van de Graaf PJW Schuyl ThM Wortel H van Bekkum |
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Institution: | Laboratory of Organic Chemistry, Delft University of Technology, Julianalaan 136, Delft, The Netherlands |
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Abstract: | The mass spectra of a series of 7-alkyl substituted 3-oxabicyclo3.3.1]nonanes are recorded. The fragmentation has been studied by the use of the metastable DADI and defocussing techniques. The character of the alkyl group is found to influence the fragmentation pattern. Stereoselective fragmentations for the 7-t-butyl derivatives are observed. In the endo-isomer, in contrast to the exo-isomer, a transannular hydrogen transfer plays a role. |
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