Abstract Aminomethylation of several hydrospirophosphoranes and their derivatives, using chloro-, alkoxy-, and amino-substituted methylamines of various structures, is proposed as the convenient method for the synthesis of new N, N-disubstituted aminomethylspirophosphoranes. The unique reaction of aminomethylphosphonites with ethylene glycol also resulted in the aminomethylspirophosphoranes via the ...