Add time:09/03/2019 Source:sciencedirect.com
Electronic effects of electron-donating and electron-withdrawing substituents at the para position of the phenyl moieties of BINAP ligands were studied towards asymmetric hydrogenation of α-(acylamino)acrylic acids. Enantiomeric excesses varied as a linear relationship towards Hammett coefficients σp of electron-donating groups between 0 and −0.63.
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