Air-stable zirconocene bis(perfluorobutanesulfonate) as a highly efficient catalyst for synthesis of α-aminophosphonates via Kabachnik–Fields reaction under solvent-free condition
Zirconocene bis(perfluorobutanesulfonate) [Cp2Zr(OSO2C4F9)2·2H2O] was successfully synthesized by treatment of Cp2ZrCl2 with C4F9SO3Ag, and was found to have the nature of air-stability, water tolerance, high thermal stability and strong Lewis acidity. This complex showed high catalytic efficiency for the synthesis of α-aminophosphonates via Kabachnik–Fields reaction of aldehydes/ketones, amines and
通过用C 4 F 9 SO 3处理Cp 2 ZrCl 2成功地合成了茂锆双(全氟丁烷磺酸盐)[Cp 2 Zr(OSO 2 C 4 F 9)2 ·2H 2 O]。Ag,并且具有空气稳定性,耐水性,高热稳定性和强路易斯酸性的性质。该络合物在温和无溶剂的条件下,通过Kabachnik-Fields反应醛/酮,胺和亚磷酸二乙酯,显示出对α-氨基膦酸酯合成的高催化效率。此外,在五个周期的测试中,它可以重复使用而不会失去活动。与我们先前报道的Cp 2 Zr(OSO 2 C 8 F 17)2 ·3H 2 O·THF配合物相比,该配合物表现出更好的催化活性。
Catalyst and solvent-free, ultrasound promoted rapid protocol for the one-pot synthesis of α-aminophosphonates at room temperature
An ultrasoundpromoted easy, efficient, and environment friendly process has been devised for the synthesis of α-aminophosphonates within seconds through a one-pot three-component condensation of the aldehydes, amines, and triethylphosphite. The desired products were obtained in excellent yields and in high purity under solvent-free and catalyst-free conditions. Study with various aldehydes and amines