Sm. Bakunova et al., 1,3-dipolar cycloaddition of cyclic alpha-methoxynitrones, derivatives of 2H-imidazole 1-oxide and 4H-imidazole 3-oxide, RUSS CHEM B, 50(5), 2001, pp. 882-889
The reactions of cyclic aldo- and alpha -methoxynitrones of the 2H-imidazol
e-1-oxide and 4H-imidazole 3-oxide series with isocyanates, phenyl isothloc
yanate, N-phenylmaleimide, and dimethyl acetylene dicarboxylate were studie
d. The reactions give the corresponding 1,3-dipolar cycloaddition products.
2,2-Dimethyl-4-phenyl-2H-imidazole 1-oxide does not enter into a similar r
eaction with isocyanates or phenyl isothiocyanate.