Gas phase flow thermolysis of 3-methyl-4-(methylaminomethylidene)isoxazol-5(4H)-one yielded N-methylethynamine, HC![[triple bond, length as m-dash]](https://www.rsc.org/images/entities/char_e002.gif)
CNHMe, and N-methylketenimine, H2C![[double bond, length as m-dash]](https://www.rsc.org/images/entities/char_e001.gif)
CNMe, which were observed by f.t.i.r. spectroscopy. Attempts to detect the simplest ynamine, HCCNH2, and ketenimine, H2CCNH, by an analogous route using the appropriately substituted isoxazolone were unsuccessful.
J. August, K. Klemm, H. W. Kroto and D. R. M. Walton, J. Chem. Soc., Perkin Trans. 2, 1989, 1841 DOI: 10.1039/P29890001841
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