Two diastereoisomeric cyclic dipeptides are obtained by coupling L or D-His with L-(crowned DOPA). The kinetic data on the reaction of p-nitrophenyl esters of protonated amino-acids and peptides with these His derivatives are reported.
Janus, S., & Sonveaux, E. (1992). An Optically-active Nucleophile That Catches its Substrate By 2 Points. Tetrahedron Letters, 33(26), 3757-3760. https://hdl.handle.net/2078.5/43511 (Original work published 1992)