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Synthesis of Biphenylenes and Their Π-Extended Derivatives

Ming-Lun Pan,Yao-Ting Wu

SYNLETT（2020）

Cited 3|Views28
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Abstract
A series of biphenylenes and their π-extended derivatives are easily prepared through tert-butyllithium-mediated cyclization of suitable halobiaryls and haloteraryls, respectively. The reactions proceed via the corresponding arynyl intermediates at low temperature (up to –20 °C).
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Key words
arynes,biphenylenes,organolithiums,[3]phenylenes
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