Biomimetic approach for the synthesis of N,N′-diarylsubstituted formamidines catalyzed by β-cyclodextrin in water

An environmentally benign and highly efficient biomimetic approach for the synthesis of N,N′-diarylsubstituted formamidines in water catalyzed β-cyclodextrin is described under neutral condition with quantitative yields of products. β-Cyclodextrin has been recovered and reused.