24647-29-8Relevant articles and documents
Synthesis of cyclic γ-amino acids for foldamers and peptide nanotubes
Rodriguez-Vazquez, Nuria,Salzinger, Stephan,Silva, Luis F.,Amorin, Manuel,Granja, Juan R.
, p. 3477 - 3493 (2013/07/11)
Cyclic γ-amino acids are molecular building blocks of great interest in peptide and foldamer chemistry, as they allow the preparation of new structures that are not found in Nature. In this paper, we describe the synthesis of cyclic γ-amino acids that have a cis relationship between the amino and the carboxylic acid groups. This arrangement, in most cases, induces the resulting peptides to adopt a flat conformation, which makes them appropriate for the design of foldamers that adopt β-sheet-type structures. We describe the synthesis of cyclic γ-amino acids that have a cis relationship between the amino and the carboxylic acid groups. This makes them suitable for the design of foldamers that adopt β-sheet-type structures.
HETEROCYCLIC CYCLOPENTYL TETRAHYDROISOQUINOLINE AND TETRAHYDROPYRIDOPYRIDINE MODULATORS OF CHEMOKINE RECEPTOR ACTIVITY
-
Page 86, (2008/06/13)
The present invention is directed to compounds of formula (I), wherein R1, R2, R3, R4, R5, R6, R7, R8, R9, X, n and the broken lines are as defined herein which are useful as modulators of chemokine receptor activity. In particular, these compounds are useful as modulators of the chemokine receptor CCR-2.
Nitrenium and Carbenium Ions in Rearrangements of 2-Azabicyclic Systems
Heesing, Albert,Herdering, Wilhelm
, p. 1081 - 1096 (2007/10/02)
An ionic mechanism proceeding in intimate ion pairs is suggested for the rearrangement of N-sulfonyloxy derivatives of 2-azabicycloheptane and -hept-5-ene (e. g. 9, 11 -> 10, 12). 1.Experiments with 18O labelled educts show partial scrambling dependend both on structure of educt and solvent. 2.In methanol the intermediate carbenium ions (19, 23) react to give methoxy compounds. 3.MINDO/3-calculations are in agreement with the experiments: a) In the saturated systems the nitrenium ion 20 is a stable intermediate. b) The optimized geometries of the rearranged carbenium ions (21, 23) are consistent with the products obtained in methanol.