PREPARATION OF OCTAETHYL-3-AMINO-PENTANE-1,1,5,5-TETRAKISPHOSPHONATE BY CATALYTIC HYDROGENATION OF THE CORRESPONDING 3-NITRO-COMPOUND
作者:W. Winckler、Th. Pieper、B. K. Keppler
DOI:10.1080/10426509608046357
日期:1996.5.1
The aim of this investigation was to find a convenient synthetical access to tetraethyl-3-amino-1,1-bisphosphonates, a class of chemical compounds which are useful agents in the concept of osteotic vectorisation of antitumor and antiinflammatory drugs. Base-catalyzed addition of nitroalkanes to tetraethylethenylidenebisphosphonate 1 affords the tetraethyl-3-nitro-alkane-1,1-bisphosphonates 3 and 4 and octaethyl-3-nitro-pentane-1,1,5,5-tetrakisphosphonate 2, which can be hydrogenated to the corresponding 3-amino-alkane-1,1-bisphosphonates 6 and 7 and the title compound octaethyl-3-amino-pentane-1,1,5,5-tetrakisphosphonate 5.