One-pot synthesis of 2-amino-4H-chromen-4-yl phosphonate derivatives using β-cyclodextrin as reusable catalyst in water

Various 2-amino-4H-chromen-4-yl phosphonate derivatives were synthesized in good yields by condensation of salicylaldehyde, malononitrile or ethylcyanoacetate, and triethyl phosphite using β-cyclodextrin as a reusable catalyst under neutral conditions, in water.