Cycloaddition Reaction: Synthesis of 5-Substituted 1,3,4-Thiadiazolo[3,2-a]pyrimidin-6-one
Abstract
1,3,4-Thiadiazolo[3,2-a]pyrimidin-6-ones are synthesised by a (4+2) cycloaddition reaction of arylidineamino-1,3,4-thiadiazole and aryl ketenes formed in situ.