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Dimethyl 3‐[(4‐nitro)phenyl]aziridine‐2,2‐dicarboxylate (3a) represents a new, photochromic aziridine. 3a and related aziridines undergo cycloadditions with dipolarophiles to form five‐membered heterocycles and react with nucleophiles with cleavage of the C2C3 bond.
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Tanja Schirmeister (1997) studied this question.
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