A convenient approach to synthesize novel selenium-beta-lactams, 3-selena-1-dethiacephems and selenazepines, was accomplished via the regioselective iodocyclization reaction. The substituent of allenyl moieties dramatically influenced the regiochemical outcome in the iodocyclization of allene-selenourea derivatives.
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Garud et al. (2008) studied this question.
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