ISSN:
0030-493X
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Comparison of the mass spectra of 3,4-hydrated 4-trifluoromethylpteridine derivatives with those of corresponding anhydrous compounds shows that this technique can be used to deduce the position of covalent hydration in heterocyclic compounds.It is less easy to demonstrate the presence of added water molecules in 5,6,7,8-dihydrated derivatives of ethyl pteridine-4-carboxylates, but spectra run at low ionising voltages give the required information.Two hydrates (3,4-hydrates of 4-ethoxycarbonyl- and 4-trifluoromethyl-pteridine-2(1H)-thione) which are very much more thermally stable than usual are also discussed.Metastable peaks and accurate mass measurements support many of the postulated fragmentation pathways.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/oms.1210070609
Permalink
