Is. Alferev et Nv. Mikhalin, REACTIONS OF VINYLIDENEDIPHOSPHONIC ACID WITH NUCLEOPHILES .5. ADDITION OF HETEROCYCLIC AMINES AND TRIMETHYLAMINE TO VINYLIDENEDIPHOSPHONICACID, Russian chemical bulletin, 44(8), 1995, pp. 1528-1530
It has been shown that heterocyclic amines can be added to the activat
ed double bond of vinylidenediphospfionic acid to form adducts with be
taine structures. Of aliphatic amines only trimethylamine reacts with
vinylidenediphosphonic acid.