Processes for asymmetric conversion of 3-fluoro-l-alanine...

Details Processes for asymmetric conversion of 3-fluoro-l-alanine... Processes for asymmetric conversion of 3-fluoro-l-alanine...

C - Chemistry, Metallurgy

07

C

260/534.1

C07C 51/00 (2006.01) C07C 53/21 (2006.01) C07C 59/19 (2006.01)

Patent

CA 1045157

A B S T R A C T The invention is concerned with a process for converting 2-deutero-3-fluoro-L-alanine to the corresponding D-isomer by reacting the L-isomer in solution in aqueous hydrohalic acid with sodium nitrite to form the L-2-deutero- 2-halo-3-fluoropropionic acid and reacting the latter with ammonia or sodium azide to replace the 2-halo by 2-azido, followed by catalytic hydrogenation.

246060

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