Nitron derivative, 8-hydroxy-1,4,5,7-tetramethyl-6,8-diazabicyclo [3.2.1]oct-6-ene 6-oxide, was obtained by the cyclodimerization of 3-methyl-3-buten-2-one oxime at 80 °C. This nitron was easily converted into the stable nitroxy radical by the attack of poly(N-methylacrylamide) radical.
The thermal oligomerization of 3-methyl-3-buten-2-one oxime leads to crystalline nitrone derivatives, 8-hydroxy-1,4,5,7-tetramethyl-6,8-diazabicyclo[3.2.1]oct-6-ene 6-oxide. Its crystal structure has been determined by X-ray diffraction. The space group is P21/n with a=9.459(3), b=10.335(3), c=11.352(4) Å, β=105.50(2)°, and Z=4.