Preparation of N,N'-bis(aryl)guanidines from electron deficient amines via masked carbodiimides

Article abstract of DOI:10.1016/S0040-4039(97)01598-0

Preparation of N,N'-bis(aryl)guanidines by alkylation of electron deficient amines with trityl protected carbodiimides is described. Also reported is a method for the dehydration of N-trityl-N'-aryl ureas to the corresponding carbodiimides using the Burge