Chemoenzymatic Synthesis of Ortho-, Meta-, and Para-Substituted Derivatives of L-Threo-3-Benzyloxyaspartate, an Important Glutamate Transporter Blocker
ChemCatChem(2015)
摘要
A simple, three‐step chemoenzymatic synthesis of L‐threo‐3‐benzyloxyaspartate (L‐TBOA), as well as L‐TBOA derivatives with F, CF3, and CH3 substituents at the aromatic ring, starting from dimethyl acetylenedicarboxylate was investigated. These chiral amino acids, which are extremely difficult to prepare by chemical synthesis, form an important class of inhibitors of excitatory amino acid transporters involved in the regulation of glutamatergic neurotransmission. In addition, a new chemical procedure for the synthesis of racemic mixtures of TBOA and its derivatives was explored. These chemically prepared racemates are valuable reference compounds in chiral‐phase HPLC to establish the enantiopurities of the corresponding chemoenzymatically prepared amino acids.
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关键词
biocatalysis,excitatory amino acid transporters,glutamate,inhibitors,threo-3-benzyloxyaspartate
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