N-Sulphonyldihydro-1,3,5-dioxazines (I) and di-N-sulphonyltetrahydro-1,3,5-oxadiazines (II) can be obtained by the reaction of sulphonamides with trioxan (as source of formaldehyde) in a strong organic acid medium at 35°. Under analogous conditions, a new procedure of wide scope leads to tri-N-sulphonylhexahydro-1,3,5-triazines (III).
O. O. Orazi and R. A. Corral, J. Chem. Soc., Perkin Trans. 1, 1975, 772 DOI: 10.1039/P19750000772
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