Abstract
Amino acid amides react with diethyl oxalate and sodium ethoxide to yield 6-substituted piperazine-2,3,5-triones, which can be mono-alkylated at N4, bis-alkylated at N4 and C6, or tris-alkylated at N4, N1, and C6 under mild basic conditions; this provides access to i) a,a-disubstituted cyclic peptide derivatives; ii) constrained peptides via C(a)-N bond formation; iii) DKP analogues.
Original language | English |
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Pages (from-to) | 7557-7560 |
Number of pages | 4 |
Journal | Tetrahedron Letters |
Volume | 40 |
Issue number | 42 |
DOIs | |
Publication status | Published - 15 Oct 1999 |
Keywords
- Amino acids and derivatives
- Peptide analogues/mimetics
- Piperazines/piperazinones