The conditions for the condensation of 1,2-nonsubstituted diaziridines
with CH2O and NH3 (or AlkNH(2)) to the corresponding 1,3,5-triazabicy
clo[3.1.0]hexanes have been found and 3-phenylsulfonyl, 3-trimethylsil
yl, 3-nitroso, and 3-nitro derivatives of the latter have been obtaine
d.