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Optically pure dicyano oxa[7]helicenes and helicene‐like molecules have been prepared and investigated for their optical behavior. The isomers of the intermediate 4,4′‐biphenanthrene‐3,3′‐diol were resolved by physically separating their 1‐menthyl carbonate derivatives. In this work a mild method was developed to cleave ArOMe in presence of a cyano group. The optical rotation of atropisomeric diol,...
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