An asymmetric addition of naphthols to in situ generated para-quinone methides catalyzed by a chiral phosphoric acid is described. A range of useful triarylmethanes can be generated from stable general para-hydroxybenzyl alcohols with good efficiency and enantioselectivity.
Y. F. Wong, Z. Wang and J. Sun, Org. Biomol. Chem., 2016, 14, 5751 DOI: 10.1039/C6OB00125D
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