Synthesis of enantiomerically pure cis and trans 2-aminocyclopentanecarboxylic acids. Use of proline replacements in potential HIV-protease inhibitors
摘要:
The synthesis of the four diastereomeric 2-aminocyclopentanecarboxylic acids, their use as replacements for proline in potential HIV protease inhibitors containing a hydroxyethylamine dipeptide isostere and the evaluation of the biological activity of these is described. (C) 1997 Elsevier Science Ltd.
New Proline Mimetics: Synthesis of Thrombin Inhibitors Incorporating Cyclopentane- and Cyclopentenedicarboxylic Acid Templates in the P2 Position. Binding Conformation Investigated by X-ray Crystallography
With the aim to prepare nonpeptidic thrombin inhibitors, the amino acids of the thrombin-inhibiting tripeptide chain D-Phe-Pro-Arg were replaced with isosteres. Arg was replaced with the more rigid P1 truncated p-amidinobenzylamine (Pab), Pro with either cyclopentane-1,2-dicarboxylic acid or cyclopentene-1,5-dicarboxylic acid, and D-Phe with a series of readily available lipophilic amines. One of the most potent compounds (25, pIC(50) = 6.01) in these series was cocrystallized with thrombin where the X-ray crystal structure provide insight to the structure-activity relationship (SAR).
Solvent Free Thioacetalization of Carbonyl Compounds Catalyzed by Cu(OTf)<sub>2</sub>-SiO<sub>2</sub>
作者:R. Vijaya Anand、P. Saravanan、Vinod K. Singh
DOI:10.1055/s-1999-2635
日期:1999.4
Aldehydes and ketones were thioacetalyzed using 1,2-ethanedithiol in the presence of a catalytic amount of Cu(OTf)2-SiO2 under solvent free conditions in excellent yields.
The synthesis of the four diastereomeric 2-aminocyclopentanecarboxylic acids, their use as replacements for proline in potential HIV protease inhibitors containing a hydroxyethylamine dipeptide isostere and the evaluation of the biological activity of these is described. (C) 1997 Elsevier Science Ltd.