Abstract
N-Acetyl- and N-formyl-ortho-alkenyl(cycloalkenyl)anilines were synthesized. Their reaction with P2O5 or PCl5 afforded quinolines. By reaction of the ortho-alkenyl(cycloalkenyl)anilines with 1-methylimino- or 1-phenylimino-1-chloroethanes amidines were obtained that were cyclized in the polyphosphoric acid. The reaction with the polyphosphoric acid of amidines prepared from alkenylanilines and 1-methylimino-1-chloroethane gave rise to 3-methyl-3,4-dihydroquinazolines; on replacing in the substrate methylimine group for phenylimine one the yield of quinazoline decreased.
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Gataullin, R.R., Afon'kin, I.S., Fatykhov, A.A. et al. Reactions of N- and C-Alkenylanilines: I. Synthesis of Anilides and Amidines from ortho-Alkenyl(cycloalkenyl)anilines and Their Transformations. Russian Journal of Organic Chemistry 37, 834–840 (2001). https://doi.org/10.1023/A:1012413715466
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DOI: https://doi.org/10.1023/A:1012413715466