Some reactions of dihalogenoketens with carbodi-imides
Abstract
Dichloroketen reacts smoothly with dicyclohexylcarbodi-imide to give 3,3-dichloro-1-cyclohexyl-4-cyclohexyliminoazetidin-2-one. Some reactions of the azetidinone are described. A similar reaction takes place with di-isopropylcarbodi-imide, but di-o-tolylcarbodi-imide did not react. The interaction of difluoroacetyl chloride, triethylamine, and dicyclohexylcarbodi-imide yields NN′-bis(difluoroacetyl)-NN′-dicyclohexylurea.