Heterocyclization of 5-(Arylmethylidene)pyrimidine-2,4,6(1H,3H,5H)-triones with Arenecarbaldehyde Oximes in the Presence of N-Bromosuccinimide and Triethylamine

详细

5-(Arylmethylidene)pyrimidine-2,4,6(1H,3H,5H)-triones reacted with substituted benzaldehyde oximes in the presence of N-bromosuccinimide and triethylamine to give 1,4-diaryl-2-oxa-3,7,9-triazaspiro-[4.5]dec-3-ene-6,8,10-triones and 3,4-diaryl-1,2,5-oxadiazole N-oxides.