W. Abdou, N. Ganoub, A. Fahmy
Oct 1, 2005
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Influential Citations
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Journal
Phosphorus, Sulfur, and Silicon and the Related Elements
Abstract
A series of fused pyran- (∼ 40% yield) and furan- (∼ 20% yield) derivatives were regioselectively prepared from the reactions of 5,6-difur-2′yl-3-oxo-2,3-dihydropyridazin-4-carbonitrile with ester- and keto phosphorus ylides, whereas new ylides were obtained, in addition to fused furans, in almost equal yields (33%) from the reaction of the same substrate with cyanomethylene(triphenyl)phosphorane. However, application of such Wittig reagents on 2-[(benzylidene)amino]-benzonitrile afforded, in all cases, 4-hydroxyquinolines in a ∼ 42% yield as major products. Moreover, 2-[(triphenylphosphoranylidene)amino] benzonitrile, with the corresponding alkene, was also isolated a side products.