... Please enable JavaScript to use all the features on this page. Tetrahedron Letters. Volume 32, Issue 20, 13 May 1991, Pages 2229–2232. Cover image Cover image. A new strategy for the synthesis of biflavonoids via arylboronic acids. ... 1991, Available online 24 April 2001. Abstract. Amentoflavone derivatives were prepared by catalytic coupling of 8-flavone-boronic acids with iodoflavones. 3-Arylflavones, as biflavonoid synthon, are accessible by the method. ...