Efficient solvent free synthesis of tertiary α-aminophosphonates using H2Ti3O7 nanotubes as a reusable solid-acid catalyst†,10.1039/C5NJ01914A

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Efficient solvent free synthesis of tertiary α-aminophosphonates using H2Ti3O7 nanotubes as a reusable solid-acid catalyst†

Bhoomireddy Rajendra Prasad Reddy,Peddiahgari Vasu Govardhana Reddy,Bijivemula N. Reddy

New Journal of Chemistry Pub Date : 09/30/2015 00:00:00 , DOI:10.1039/C5NJ01914A

Abstract

In this paper, TiO₂ fine particles, TiO₂-P25, protonated trititanate (H₂Ti₃O₇) nanorods and nanotubes were used as recyclable solid-acid catalysts for the solvent free synthesis of tertiary α-aminophosphonates through Kabachnik–Fields reaction. Among them, H₂Ti₃O₇ nanotubes showed remarkable catalytic performance and it was due to strong and sufficient Lewis and Brønsted acid sites on a large nanotubular surface. More importantly, for the first time we reported some novel 5,8-dioxa-10-azadispiro[2.0.4.3]undecane bearing tertiary α-aminophosphonates.