Synthesis of (R)-4-Oxo-5-phosphononorvaline, anN-Methyl-D-aspartic Acid Receptor Selective β-Keto Phosphonate

Abstract
(R)-4-Oxo-5-phosphononorvaline (1), a selective NMDA glutamate site antagonist, has been synthesized in four steps (overall yield = 31%) from (R)-aspartic acid, without racemization.

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