Abstract
The kinetics of thermal decomposition of 3'-azidothymidine (AZT) in melt at 140-201°C were studied by the thermogravimetric and manometric methods. The process follows the first-order kinetics and is decribed by the Arrhenius equation: k = 1014.7±0.5 exp[-(38100±900)/RT] (1/s). The kinetic and activation parameters are typical of thermal decomposition of aliphatic azides; they suggest that decomposition of the azido group is the rate-determining stage. The formation of nitrogen (1 mol per mole of AZT), furan, methyl alcohol, water, and carbon dioxide was confirmed by mass spectrometry. Thymine was found to be one of the condensed products of thermal decomposition of 3'-azidothymidine.
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