Spiro compounds 7,11-diaryl-2,4-diazaspiro[5.5]undecane-1,3,5,9-tetraones 3a–e and 7,11-diaryl-3-thioxo-2,4-diazaspiro[5.5]undecane-1,5,9-triones 3f–j were prepared from the reaction of 1,5-diaryl-1,4-pentadien-3-ones 2a–f with barbituric acid (1a) and 2-thiobarbituric acid (1b). The structures of the products were confirmed by UV, IR, 1H and 13C NMR, MS and elemental analysis.
VeeriahT., and SonduS., Ind. J. Chem., 1996, 35A, 1073.
17.
AhmedM.G., AhmedS. A., RommanU. K. R., AhmedS. M., and UddinM. K., Dhaka Univ. J. Sci., 2005, 53, 1.
18.
LevyG.C., and NelsonG. L., Carbon-13 Nuclear Magnetic Resonance for Organic Chemists, John Wiley & Sons, 1972, p. 133.
19.
AhmedM.G., AhmedS. A., RommanU. K. R., MohsinT., and KiuchiF., Dhaka Univ. J. Sci., 1998 (July), 46, 253 and references therein.
20.
OttoH.H., and TriepelJ., Liebigs Ann. Chem., 1976, 1982.
21.
FurnissB.S., HannafordA. J., RogersV., SmithP. W. G., and TatchellA. R., in A.I. Vogel's Text Book of Practical Organic Chemistry, 4th ed, Longman Scientific and Technical, 1978, p. 794.
