Reactivity of Thioaldehyde: Cyclization Reaction of 6-Amino-1,3-dimethyl-5- thioformyluracil with Enamines into Pyrido[2,3-d]pyrimidine-2,4-(1H,3H)-diones
Reactivity of Thioaldehyde: Cyclization Reaction of 6-Amino-1,3-dimethyl-5- thioformyluracil with Enamines into Pyrido[2,3-<i>d</i>]pyrimidine-2,4-(1<i>H</i>,3<i>H</i>)-diones