Abstract
The reactions of 5-(arylmethylidene)-2,4,6-pyrimidine-2,4,6(1H,3H,5H)-triones with arenecarbaldehyde phenylhydrazones in the presence of sodium N-chlorobenzenesulfonamide give 2,3,7,9-tetraasaspiro-[4.5]dec-1-ene-6,8,10-triones in yields of 30–45%.
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