Abstract

The asymmetric synthesis of S-Ala, S-Val, S-Trp, S-Phe, S-Nle, and S-3,4-dimethoxy-Phe with optical yields of about 90% is carried out by the alkylation of glycine in Ni(II) complexes of its Schiff base with S-2-N-(N'-benzylpropyl) aminobenzophenone by the action of NaOH in DMF or acetonitrile.

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