anhydride/2-fluoropyridine as an activation system, the couplingreactions of secondary N-aryl amides with terminal alkynes yielded substituted quinolines in moderate to excellent yields. The reaction tolerated both electron-donating and electron-withdrawing groups at the benzamide moiety. Electron-rich aryl acetylenes served as excellent coupling partners, and aliphatic terminal alkynes such as cyclopropyl
Aromatic imines react with phenylacetylene or styrene in an acetonitrile solution of iron(III) chloride to give quinolines 3 or their tetrahydro derivatives 11 together with variable amounts of products 4 arising from the reduction of the imines. The initial step appears to be a one-electron oxidation to generate iron(II) and an imine radical cation. When the reactions are carried out in the presence of stoichiometric amounts of tetrachloro-p-benzoquinone (chloranil), only quinolines 3 are obtained.
Nishio, Takehiko; Omote, Yoshimori, Journal of the Chemical Society. Perkin transactions I, 1983, # 8, p. 1773 - 1775
作者:Nishio, Takehiko、Omote, Yoshimori
DOI:——
日期:——
LEARDINI R.; NANNI D.; PEDULLI G. F.; TUNDO A.; ZANARDI G., J. CHEM. SOC. PERKIN TRANS.,(1986) N 9, 1591-1594
作者:LEARDINI R.、 NANNI D.、 PEDULLI G. F.、 TUNDO A.、 ZANARDI G.