Subsequently, the thermal stabilities of the carbamoyloximes were investigated on the small molecule diols at 90, 130, and 170 °C each for 24 h in DMSO-d6 after which DMF was added as internal standard for NMR measurements (Table ). At 90 °C, AO was quantitatively converted to its corresponding nitrile confirming previous observations (Figure ). MKO and TKO showed considerably higher thermal stabilities and ketone formation was not observed. Both MKO and TKO were stable at 130 °C and converted into an unidentifiable mixture of decomposition products at 170 °C (Figure and).