Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
Letter
Cramping an Alkyl Group by Rigid Macrocyclic Framework
Shinji ToyotaTomohiro OkiMasataka InoueKan WakamatsuTetsuo Iwanaga
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Volume 44 (2015) Issue 7 Pages 978-980

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Abstract

An anthracene–acetylene cyclic dimer with an intra-annular ethyl group was synthesized as a sterically congested π-conjugated compound by cyclization with Sonogashira coupling. The ethyl group was conformationally cramped by the rigid macrocyclic framework because of the severe steric interactions, as revealed by 1H NMR spectroscopy and DFT calculation.

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© 2015 The Chemical Society of Japan
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