Die UV-Dimerisation von 1.3-Dimethyluracil in der Eismatrix / UV-Dimerization of 1,3-Dimethyluracil in Ice-Matrix
Open Access
- 1 December 1972
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 27 (12) , 1475-1480
- https://doi.org/10.1515/znb-1972-1209
Abstract
UV irradiation of 1,3-dimethyluracil in ice-matrix yields four dimeric dimethyluracils (2 c) - (5 c), which could be isolated by preparative thin-layer chromatography. Attemps for structure elucidation of these four dimers by UV, IR, NMR and mass-spectrometric methodes pointed out, that only NMR-spectra give structural evidences; by IR - not by mass-spectra - certain identification of dimers is possible. In accordance with dimeric thymines and dimeric uracils the syn-dimeric dimethyluracils (3 c) and (5 c) are stable in 6 N HCl, the anti-dimers are monomerisized. Investigations of stability in HCl gives informations about structures of cyclobutane pyrimidine dimersKeywords
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