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This short review summarizes the examples to date of successful (4+3) cycloadditions, including formal (4+3) cycloadditions, where pyrrole derivatives reacted as the diene component, to provide aza-bridged bicyclic and polycyclic adducts. 1 Introduction 2 Unsubstituted Pyrroles as Dienes in (4+3)
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Hu et al. (2019) studied this question.
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