10.6084/m9.figshare.5766714.v2 D. Ravikumar D. Ravikumar S. Mohan S. Mohan Ch. Subramanyam Ch. Subramanyam K. Prasada Rao K. Prasada Rao Solvent-free sonochemical kabachnic-fields reaction to synthesize some new α-aminophosphonates catalyzed by nano-BF<sub>3</sub>•SiO<sub>2</sub> Taylor & Francis Group 2018 α-aminophosphonates ultrasonic irradiation nano-BF3•SiO2 antioxidant activity 2018-01-24 14:12:35 Journal contribution https://tandf.figshare.com/articles/journal_contribution/Solvent-Free_Sonochemical_Kabachnic-Fields_Reaction_To_Synthesize_Some_New_-Aminophosphonates_Catalyzed_By_Nano-Bf_sub_3_sub_Sio_sub_2_sub_/5766714 <p>To obtain a rapid, efficient synthesis of some new α-aminophosphonates, ultrasonic irradiation has been applied to the reaction mixtures containing amine, aromatic or heteroaromatic aldehydes and triethyl phosphite. The Kabachnik-Fields reaction was performed by using nano-BF<sub>3</sub>•SiO<sub>2</sub> as a recyclable catalyst under solvent free conditions. Key advantages of this procedure consist in the eco-friendly and highly efficient reaction conditions, high yields, an easy work-up procedure, short reaction times and solvent free conditions. All title compounds were characterized by spectral and elemental analysis. They were further screened for their <i>in vitro</i> antioxidant activity by the DPPH, O<sup>2−</sup> and NO methods. The majority of the title compounds showed good antioxidant activity when compared with the standard antioxidants.</p>