Synthesis of dihydrofurans containing trifluoromethyl ketone and heterocycles by radical cyclization of fluorinated 1,3-dicarbonyl compounds with 2-thienyl and 2-furyl substituted alkenes


Yilmaz M.

TETRAHEDRON, cilt.67, ss.8255-8263, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 67 Konu: 43
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1016/j.tet.2011.08.098
  • Dergi Adı: TETRAHEDRON
  • Sayfa Sayıları: ss.8255-8263

Özet

Manganese(III) acetate based radical cyclization of various fluorinated 1,3-dicarbonyl compounds with 2-thienyl and 2-furyl substituted alkenes produced 3-trifluoroacetyl and 2-trifluoromethyl-dihydrofurans in good yields. The radical cyclizations of 2-methyl-5-[(E)-2-phenylvinyl]furan 2b and 2-[(E)-2-phenylvinyl]thiophene 2c led to the formations of 5-(5-methyl-2-furyl)-4,5-dihydrofuran and 5-(2-thienyl)-4,5-dihydrofuran, respectively. In the reactions of 1,3-dicarbonyls with alkenes, 2-thienyl substituted alkenes formed 4,5-dihydrofurans in higher yields than 2-furyl substituted alkenes. (C) 2011 Elsevier Ltd. All rights reserved.