| 摘要 |
<p>Amine salts of N-acetylamino methylene phosphonic acid, of formula (I), in which R1R2 and R3 are H or 1-3C alkyl are made by a condensation reaction between the acid and the amine at a temp. below the b.pt. of the mixt., in presence of a solvent for the amine and the salt formed, but not for the acid, or for the amine, but not for the acid or the salt formed.</p> |
