K. Kobayashi et al., CERIC AMMONIUM-NITRATE MEDIATED CYCLOADDITION OF HYDROXYQUINONES WITHALKENES FOR THE ONE-STEP CONSTRUCTION OF FUROQUINONE DERIVATIVES, Chemistry Letters, (6), 1996, pp. 451-452
A one-step formation of furoquinones, such as naphtho[2,3-b]furan-4,9-
dione, naphtho[1,2-b]furan-4,5-dione, benzofuran-4,7-dione, and benzof
uran-4,5-dione derivatives, by the eerie ammonium nitrate mediated [32] type cycloaddition of 2-hydroxy-1,4-naphthoquinones and 2-hydroxy-1
,4-benzoquinones with alkenes or phenylacetylene is described.