Synthesis and properties of O,O-dialkyl [1-hydroxy-3-(dialkylamino)-2,2-dimethylpropyl]phosphonates
摘要:
O,O-Dialkyl [1-hydroxy-3-(dialkylamino)-2,2-dimethylpropyl]phosphonates were prepared for the first time. By means of NMR H-1, IR spectroscopy and quantum-chemical calculations the presence in them of various H-bonds was established. In the crystalline state P=OaEuro broken vertical bar HO intermolecular hydrogen bonds favor the formation of cyclic dimer associates D (P=O). In the liquid state and concentrated solutions P=OaEuro broken vertical bar HO and NaEuro broken vertical bar HO intermolecular hydrogen bonds cause the formation of cyclic dimer associates D (P=O) and D-N, and intramolecular hydrogen bonds provide the existence of different conformations of the monomer form MN, the most stable among them with the non-strained six-membered aEuro broken vertical bar NCCCOHaEuro broken vertical bar ring.
我们发现化合物III可以通过亚磷酸氢二烷基酯I与3-(二烷基氨基)-取代的醛II反应来制备。向化合物 I 和 II 的混合物中加入乙醇钠或少量钠会引起放热反应。在用乙酸中和反应混合物并在高真空中蒸发挥发性物质后,化合物III被鉴定为粗材料,因为它们在尝试真空蒸馏时分解。化合物 III 也可以通过在 80℃加热化合物 I 和 II 的混合物来获得。在这些条件下,由于在起始醛中存在叔氨基,会发生亲核催化。