Abstract
Sonolysis of cytosine has been studied at 630 kHz in the presence of air and nitrogen. The degradation products were identified by gas chromatographic – mass spectral analysis. Under aerated conditions the following products were found: urea, formyl urea, parabanic acid, isobarbituric acid, oxaluric acid, alloxan monohydrate, alloxantin, dialuric acid, and uracil glycols. Under nitrogen the degradation products were isobarbituric acid, alloxan monohydrate, and uracil glycols. The observed products have been used to develop a possible mechanism for the sonolytic degradation. There appears to be some similarity with the products reported from radiolysis studies of this compound. Sonolysis of thymine in the presence of air was reinvestigated and the gc–ms analysis shows that a previously reported, unidentified, product may be 5-hydroxy-5-methylbarbituric acid.
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