The a-nitrosostyrenes 2, generated in situ from a-halogeno oximes, underwent regioselective cycloadditon/ nucleophilic reactions with W-arylamino l,3-diazabuta-l,3-dienes 1 leading to a mixture of imidazoles, and cyclic nitrones shown to have structures 3, and 4, respectively, by X-ray crystallographic analysis. The structure 4 for cyclic nitrones was also supported by their 1,3-dipolar cycloaddition with dimethyl acetylenedicarboxylate (DM AD). The thermolysis of nitrones 4 gives imidazoles 3 via oxadiazine intermediates 6.
|Original language||English (US)|
|Number of pages||5|
|Journal||Journal of the Chemical Society - Perkin Transactions 1|
|State||Published - 1999|
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