2-Alkyl-2-carboxy-azetidines as scaffolds for the induction of γ-turns
摘要:
To investigate the ability of 2-alkyl-2-carboxy-azetidines (Azx) to induce reverse turns when incorporated into peptides, RCO-Azx-L-A1a-NHMe dipeptide derivatives were selected as simplified tetrapeptide models, in which the azetidine residue is incorporated at the i + 1 position. Molecular modelling, H-1 NMR and FTIR studies showed the high tendency of the model tetrapeptides to adopt gamma-turn conformations, indicating that these azetidine-containing amino acids could serve as general gamma-turn promoters. (c) 2007 Elsevier Ltd. All rights reserved.
Practical preparation of enantiopure 2-methyl-azetidine-2-carboxylic acid; a γ-turn promoter
摘要:
A robust and practical synthesis of each enantiomer of 2-methyl-azetidine-2-carboxylic acid, based on the use of (S)-phenylglycinol as resolving agent, is described. This synthesis affords practical quantities of this quaternary amino acid suitably N- and C-protected for use in further peptide coupling. Synthetic highlights include the formation of the azetidine ring by intramolecular alkylation and the facile separation of the diastereoisomeric amides derived from phenylglycinol. (C) 2012 Elsevier Ltd. All rights reserved.
[EN] NEUROTROPHIC 2-AZETIDINECARBOXYLIC ACID DERIVATIVES, AND RELATED COMPOSITIONS AND METHODS<br/>[FR] DERIVES NEUROTROPHIQUES D'ACIDE 2-AZETIDINECARBOXYLIQUE, ET COMPOSITIONS ET METHODES Y RELATIVES
申请人:ORTHO MCNEIL PHARM INC
公开号:WO2001004091A1
公开(公告)日:2001-01-18
Compounds having general structure (a) wherein R1 is selected from the group consisting of COCOR?2, CONHR3, SO¿2R4 and (b). X and Y are (i) C=O and (ii) O or NR5, Z is (C¿1?-C5)-straight or branched alkyl or alkenyl substituted in one or more positions with Ar, which Ar is selected from the group consisting of 2-pyridyl, 3-pyridyl, 4-pyridyl, phenyl and substituted phenyl. A ix X-Y-Z or hydrogen, pharmaceutical compositions comprising same and methods of using these compsositions to treat and prevent disorders characterized by neuronal damage.