Cylopentanone oxime reacts with S2Cl2at 4 °C in tetrahydrofuran containing a base, or in dimethylformamide, to give deep-violet crystals of the 10π-heteroaromatic trichlorocyclopenta-1,2,3-dithiazole 7 without isolable intermediates; other 1.2,3-dithiazoles (2, 4, 10, 12, 13, and 15) are readily formed similarly.
M. J. Plater, C. W. Rees, D. G. Roe and T. Torroba, J. Chem. Soc., Chem. Commun., 1993, 293 DOI: 10.1039/C39930000293
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