Phosphomolybdic acid promoted Kabachnik-Fields reaction: an efficient one-pot synthesis of α-aminophosphonates from 2-cyclopropylpyrimidine-4-carbaldehyde

2-Cyclopropylpyrimidin-4-yl-aryl/benzothiazole derived α-aminophosphonates were synthesized in a simple and efficient method from the three-component condensation reaction of 2-cyclopropylpyrimidin-4-carbaldehyde, various anilines/benzothiazole amines, and different phosphites by using 0.5 mol % of phosphomolybdic acid.