B. Dhooge et W. Dehaen, STEREOISOMERISM IN THE ADDUCTS OF APPELS SALT WITH ACTIVATED METHYLENES, Bulletin des Societes chimiques belges, 106(11), 1997, pp. 729-730
The adducts of Meldrum's acid and activated methyleneazoles with 4,5-d
ichloro-1,2,3-dithiazolium chloride are described. Some of these adduc
ts display an interesting equilibrium between two stereoisomers, which
have either a S...O or a S...N interaction.