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- W1979080888 abstract "Abstract The diketopiperazine cyclo(‐ L ‐Val‐Gly‐) ( 1 ) can be O ‐alkylated under mild acidic reaction conditions with the alkyl trichloroacetimidates 2 to the corresponding bisalkyl bislactim ethers. Alkylation of the bisbenzyl bislactim ether anion of cyclo(‐ L ‐Val‐Gly‐) 4c with benzyl bromide and subsequent hydrolysis with aqueous trifluoroacetic acid afforded D ‐phenylalanine benzyl ester ( 8 ) with an enantiomeric excess of > 95%." @default.
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- W1979080888 date "1993-03-15" @default.
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- W1979080888 title "Asymmetric Synthesis via Heterocyclic intermediates, L. – Trichloroacetimidates, II. Asymmetric Synthesis of α-Amino Acid Benzyl Esters via the Bisbenzyl Bislactim Ether of cyclo(-L-Val-Gly-)" @default.
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- W1979080888 doi "https://doi.org/10.1002/jlac.199319930153" @default.
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