A novel route has been devised for the preparation of a series of 1-aminoalkylphosphonate diesters, precursors to analogues of a-amino acids. The route involves a facile bromine substitution at the 1-position of alkylphosphonate diesters using N-bromosuccinimide, followed by azide ion displacement and catalytic hydrogenolysis.
ENZYMES IN ORGANIC CHEMISTRY, 8.<sup>[11</sup> PROTEASE-CATALYZED KINETIC RESOLUTION OF α-CHLOROACETOXYPHOSPHONATES IN A BIPHASIC SYSTEM
作者:Friedrich Hammerschmidt、Frank Wuggenig
DOI:10.1080/10426509808033735
日期:1998.10.1
Abstract Protease Chirazyme® P-2 hydrolysesracemic α-chloroacetoxyphosphonates (±1 enantiose-lectively to furnish α-hydroxyphosphonates (R)-(-)-2 with ee's ranging from 31 to 97% at a conversion of 45% and unreacted esters (S)-(+)-1.