Synthesis of a Chiral C3-Symmetric Bowl-Shaped Cyclohexapeptide Composed of Anthranilic Acid and Leucine
摘要:
A chiral C-3-symmetric bowl-shaped cyclohexapeptide (1), composed of anthranilic acid (2-aminobenzoic acid) and a-amino acid in an alternating sequence, was synthesized from 2-nitrobenzoic acid and leucine. The H-1 and C-13 NMR spectra of 1 suggest a chiral C-3-symmetric bowl-shaped structure. Molecular mechanic calculation revealed that the cyclohexapeptide becomes a bowl-shaped structure when all three a-amino acid components have homochiral side chains.