REARRANGEMENTS IN THE FURAN SERIES .4. THE REACTION BETWEEN FURAN-2-CARBALDEHYDE AND ANILINE

It has been shown that reaction of furan-2-carbaldehyde with three or four molecules of aniline gives rise to a substance assigned as 4-phenyl-l, 6-di(phenyIamino)-7-phenylimino- 3a, 4, 4a, 7, 7a, 7b-hexahydro-lH-dicyclopenta[b, d]pyrrol-2(3H)-one rather than the simple anil previously proposed. The use of an excess of furan-2-carbaldehyde gives not furoin anil but a compound of polymeric structure. © 1990 ASEG.