Lithiated methyl N-phenyl-2-trimethylsilylethanimidothioate is regioselectively C-alkylated at –78 °C but, at a higher temperature in the presence of 1 equiv of butyllithium, it is converted into a lithiated ketenimine which can be protonated or alkylated to give new and stable silylated ketenimines
N. Lage, S. Masson and A. Thuillier, J. Chem. Soc., Perkin Trans. 1, 1991, 3389 DOI: 10.1039/P19910003389
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