M. Prokesova et al., INVESTIGATION OF THE ACID-CATALYZED DIELS-ALDER REACTION OF FURAN-DERIVATIVES WITH BETA-FERROCENYL-ALPHA-ENONES, Tetrahedron, 54(31), 1998, pp. 9175-9186
Attempts have been made on trifluoroacetic acid catalysed Diels-Alder
reaction of furan, 2,5-dimethylfuran and 2.5-diphenylfuran with beta-f
errocenyl-alpha-enones. No Diels-Alder products were isolated or detec
ted but products from the Friedel-Crafts beta-alkylation of furan ring
were prepared in some cases, Reaction with 1,3-diphenylbenzo[c]furan
under the same conditions resulted in the formation of a formal [4+3]
cycloaddition product containing 1.2-disubstituted ferrocene. (C) 1998
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