Ta. Engler et al., EVALUATION OF A SYNTHETIC ROUTE TO EPSILON-VINIFERIN BASED ON A NEW METHOD FOR THE STEREOSELECTIVE PREPARATION OF 2,3-DIARYL-2,3-DIHYDROBENZOFURANS, Tetrahedron letters, 35(11), 1994, pp. 1661-1664
Lewis acid-promoted reactions of unsymmetrically substituted (E)-stilb
enes with 2-methoxy-1,4-benzoquinones regio- and stereoselectively pro
duce trans 2,3-diaryl-2,3-dihydrobenzofurans.