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Synthesis and rotation barriers in 2, 6-Di-(o-anisyl) anisole

Yamamoto, Takuhei ; Chen, Pi-Yu ; Lin, Guangxin ; Błoch-Mechkour, Anna ; Jacobsen, Neil E. ; Bally, Thomas ; Glass, Richard S.

In: Journal of Physical Organic Chemistry, 2012, p. -

Variable temperature ¹H NMR spectroscopic studies of 2, 6-di(o-anisyl) anisole show syn and anti atropisomers at low temperature. The barrier for interconverting these isomers by rotation about the aryl-aryl bond, found by fitting the experimental data, is 41.2 kJ/mol.