Pyrimidine derivatives R 0510 Synthesis of 7,11-Diaryl-3-oxo(or thioxo)-2,4-diazaspiro[5,5]undecane-1,5,9-triones. Part 1. -With a view to obtaining medicinally potent compounds the title triones, e.g. (III), are prepared. -(AHMED*, M. G.; AHMED, S. A.; AHMED, S. M.; HOSSAIN, M. M.; HUSSAM, A.; J. Chem. Res. 2005, 10, 622-625; Dep. Chem., Univ. Dhaka, Dhaka 1000, Bangladesh; Eng.) -H. Haber 09-166