Katritzky AR, Todadze E, Shestopalov AA, Cusido J, Angrish P. Selective Peptide Chain Extension at the C-terminus of Aspartic and Glutamic Acids Utilizing N-protected (α-aminoacyl)benzotriazoles.
Chem Biol Drug Des 2006;
68:42-7. [PMID:
16923025 DOI:
10.1111/j.1747-0285.2006.00413.x]
[Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Aspartic and glutamic acids were selectively extended at each of the alternative C-terminals under mild conditions to afford diverse natural and unnatural N-protected dipeptides and tripeptides in yields of 73-96%. The reactions between N-protected (alpha-aminoacyl)benzotriazoles and free amino acids or dipeptides proceeded with complete retention of chirality as supported by parallel experiments involving D-Ala, L-Ala, and DL-Ala in the preparation of dipeptides and tripeptides, monitored by NMR and HPLC analyses.
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