Treatment of the ozonization products from N-acetyl- or 2-methyl-N-trifluoroacetyl-6-(cyclopent-1-enyl)anilines with NaBH4 gives 6-methyl-2-tetrahydropyranylaniline. When treated with Me2S, the ozonization products yield the corresponding oxoaldehyde dimethyl acetals. The oxidation of N-acetyl-2-(cyclopent-1-enyl)- or -(cyclohex-1-ellyl)anilines with H2O2 in HCOOH affords omega-(2-acetamidophenyl)-5-oxopentanoic or -6-oxohexanoic acid, respectively. The reaction of N-acetyl-2-(cyclopent-1-enyl)aniline with H2O2 in the presence of Na2WO4 and H3PO4 gives 3,1-benzooxazine in high yield.
Amides as precursors of imidoyl radicals in cyclisation reactions
作者:W. Russell Bowman、Anthony J. Fletcher、Jan M. Pedersen、Peter J. Lovell、Mark R.J. Elsegood、Elena Hernández López、Vickie McKee、Graeme B.S. Potts
DOI:10.1016/j.tet.2006.10.030
日期:2007.1
Amides have been successfully used as precursors of imidoyl radicals for radical cyclisation. The amides have been converted to imidoyl selanides via reaction with phosgene to yield imidoyl chlorides followed by reaction with potassium phenylselanide. Imidoyl selanides were reacted with tributyltin hydride (Bu3SnH) as the radical mediator with triethylborane or AIBN as initiators to yield imidoyl radicals
Cyclization ofN-acetyl-ortho-cycloalkenylanilines on treatment with bromine andN-bromosuccinimide
作者:R. R. Gataullin、I. S. Afon'kin、A. A. Fatykhov、L. V. Spirikhin、I. B. Abdrakhmanov
DOI:10.1007/bf02499076
日期:1990.1
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作者:R. R. Gataullin、I. S. Afon'kin、A. A. Fatykhov、L. V. Spirikhin、I. B. Abdrakhmanov
DOI:10.1023/a:1012413715466
日期:——
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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作者:R. R. Gataullin、I. S. Afonkin、A. A. Fatykhov、L. V. Spirikhin、E. V. Tal"vinskii、I. B. Abdrakhmanov
DOI:10.1023/a:1011312912357
日期:——
Electrophilic addition of HCl or Br-2 to N-acyl-2-(alk-2-enyl)anilines is accompanied by intramolecular cyclization of these amides to give 3,1-benzooxazine hydrochlorides or hydrobromides in high yields.
FLEMING, I.;LORETO, M. A.;WALLACE, I. H. M.;MICHAEL, J. P., J. CHEM. SOC. PERKIN TRANS., 1986, N 2, 349-359
作者:FLEMING, I.、LORETO, M. A.、WALLACE, I. H. M.、MICHAEL, J. P.