Abstract
A series of 4,5-bis-(alkyn-1-yl)imidazoles—‘imidazole-fused’ enediynes—were synthesized and their reactivities in photoinduced Bergman cycloaromatization reactions were determined. The more conformationally rigid analogues gave cycloaromatized products in good yields upon irradiation (450 W low-pressure mercury lamp, ambient temperature). A bicyclic analogue ( 3 ) was shown to cleave supercoiled plasmid DNA.
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