N(α)-Benzyloxycarbonyl-N(τ)-phenacyl-L-histidine and N(α)-benzyloxycarbonyl-N(π)-phenacyl-L-histidine have been prepared; extensive racemisation of the histidine residue occurs on activation of the former by means of dicyclohexylcarbodi-imide, but not with the N(π)-phenacyl acid.
J. H. Jones and W. I. Ramage, J. Chem. Soc., Chem. Commun., 1978, 472 DOI: 10.1039/C39780000472
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