Thermal behaviour of some spiro benzodiazepine derivatives

The thermal behaviour of some benzodiazepine derivatives have been studied by differential thermal analysis (DTA) and thermogravimetry (TG). It was founded that pyrolytic decomposition accompanied melting of the compounds, some of which were hydrates. Dehydration is followed by total pyrolytic decomposition in two stage. GC–MS was used to identify the products of the pyrolytic decomposition.