Recyclable Bismuth Complex Catalyzed 1,6‐Conjugate Addition of Various Nucleophiles to para‐Quinone Methides: Expedient Access to Unsymmetrical Diaryl‐ and Triarylmethanes

An efficient method for the 1,6‐conjugate addition of para ‐quinone methides with readily available nucleophiles was developed. This protocol provides a straightforward access to a class of diaryl and triarylmethane derivatives with good to excellent yields in the presence of (C 4 H 12 N 2 ) 2 [BiCl 6 ]Cl · H 2 O. Moreover, this bismuth catalyst can be recycled for several times.