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Angewandte Chemie (International ed. in English)

Highly twisted arenes by Scholl cyclizations with unexpected regioselectivity.


PMID 22057825

Abstract

Let's twist! The Scholl reaction with quinquephenyl derivatives has been shown to have an unexpectedly strong preference for forming twisted, helicene aromatic polycycles, instead of their flat counterparts. This tendency is so strong that it will overcome even severe steric hindrance, and the procedure can be used in the efficient synthesis of hexa-tert-butylhexabenzotriphenylene from a simple biaryl starting material (see scheme).

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