Piperazine-2,3,5-triones in the synthesis of constrained peptides
摘要:
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 N-4, bis-alkylated at N-4 and C-6, or tris-alkylated at N-4, N-1, and C-6 under mild basic conditions; this provides access to i) alpha,alpha-disubstituted cyclic peptide derivatives; ii) constrained peptides via C(alpha)-N bond formation; iii) DKP analogues. (C) 1999 Elsevier Science Ltd. All rights reserved.
Piperazine-2,3,5-triones in the synthesis of constrained peptides
摘要:
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 N-4, bis-alkylated at N-4 and C-6, or tris-alkylated at N-4, N-1, and C-6 under mild basic conditions; this provides access to i) alpha,alpha-disubstituted cyclic peptide derivatives; ii) constrained peptides via C(alpha)-N bond formation; iii) DKP analogues. (C) 1999 Elsevier Science Ltd. All rights reserved.