SCHEDULED MAINTENANCE
The reaction of carboxylic acid esters with amines is accelerated in the presence of catalytic amounts of RhCl3.3H2O at a reasonably low temperature; optically active 2,5-dioxopiperazines can be synthesized in high yield from the corresponding amino-acid esters using this procedure.
Y. Yamamoto, H. Yatagai and K. Maruyama, J. Chem. Soc., Chem. Commun., 1980, 835 DOI: 10.1039/C39800000835
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