Ethyl bis(methylthio)methyleneaminoacetate 1 reacts with 1,1,1-trifluoroacetone in potassium tert-butoxide to afford ethyl 3-methyl-2,4,4-tris(methylthio)-2-(methylthiocarbonylamino)but-3-enoate 2, an unexpected product, whose structure has been determined by X-ray analysis.
J. Rodriguez, A. Perales, C. A. Ibarra, M. I. López-Sánchez and M. L. Quiroga, J. Chem. Soc., Perkin Trans. 1, 1992, 291 DOI: 10.1039/P19920000291
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