JOURNAL OF HETEROCYCLIC CHEMISTRY, vol.41, no.2, pp.151-155, 2004 (SCI-Expanded)
The Wittig reaction of 2,3-dihydro-4-(4-methoxybenzoyl)-5-(4-methoxyphenyl)-furan-2,3-dione (1) with methyl (triphenylphosphoranylidene)acetate (2) stereo- and regioselectively afforded methyl (Z)-[2,3-dihydro-4-(4-methoxybenzoyl)-5 - (4-methoxyphenyl) - 3 -oxofuran-2-ylidene]acetate (3) in good yield. The reactions of 3 with primary amines (4a-k) gave corresponding 1-substituted 2,3 -dihydro-1H-pyrrol-3 -ones (5a-k).