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Organic letters

Perylene bisimides with rigid 2,2'-biphenol bridges at bay area as conjugated chiral platforms.


PMID 20560541

Abstract

Facile nucleophilic substitution of two chlorine atoms by 2,2'-biphenol at one of the two bay areas (1,12- and 6,7-positions) of core-tetrachlorinated perylene bisimide afforded a novel, completely desymmetrized perylene bisimide building block, which could be further functionalized by substitution of the remaining two chlorine atoms. The atropisomers (P- and M-enantiomers) of the core twisted perylene bisimides were resolved by HPLC on a chiral column at room temperature, and the activation parameters for racemization were elucidated.

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