Aqueous organic two-phase reactions (halogen exchange, cyanation, and borohydride reduction) have been catalyzed by phosphoric triamides containing hydrophobic groups. The phosphoric triamides, which have a high cation binding ability, exibited high catalytic activity for the two-phase reactions. The catalytic activity of N-alkylteramethylphosphoric triamides (1) was higher than that of the corresponding pentamethyl derivatives and the difference has been explained in terms of the contribution of the dimeric species of 1 and/or hydrogen bonding between the NH of 1 and the anionic moieties of inorganic reagents.
含疏
水基团的
磷酸三酰胺催化了
水有机两相反应(卤素交换、
氰化和
硼氢化还原)。
磷酸三酰胺具有很强的阳离子结合能力,在两相反应中表现出很高的催化活性。N- 烷基三甲基
磷酸三酰胺(1)的催化活性高于相应的五甲基衍
生物,这种差异可以用 1 的二聚物和/或 1 的 NH 与无机试剂阴离子之间的氢键作用来解释。