USE OF CYCLOSQUARAMIDE COMPOUNDS AS ANTI-TUMOUR AGENTS
申请人:Costa Torres Antonio
公开号:US20110294772A1
公开(公告)日:2011-12-01
Use of squaramide-based macrocylic compounds as kinase inhibitor agents and as anti-tumour agents. More specifically, said compounds are used to treat diseases such as cancer, diabetes, neurodegenerative diseases, HIV replication, etc. Furthermore, the present invention likewise relates to pharmaceutical compositions that contain said compounds
Conformational Preferences and Self-Template Macrocyclization of Squaramide-Based Foldable Modules
作者:M. Carmen Rotger、M. Neus Piña、Antonio Frontera、Gabriel Martorell、Pablo Ballester、Pere M. Deyà、Antoni Costa
DOI:10.1021/jo035546t
日期:2004.4.1
Secondary squaramides have considerable potential as hydrogen bond donors and acceptors. In CHCl3 both, anti- and syn-squaramide rotamers are observed by NMR. The energetic barrier for anti/syn mutual interconversion determined by complete band shape analysis is similar to63 kJ mol(-1). As in proline derivatives, a low rotational barrier is crucial for the design of foldable modules. In this paper, folding based on the low rotational barrier of squaramides is driven by donor atoms (N or O) located in the gamma position of an alkyl chain of a secondary squaramide. We demonstrate that the resulting minimal module exists as a folded conformer through the formation of a nine-membered ring stabilized by intramolecular hydrogen bonding. Molecular mechanics calculations and NMR studies support the existence of these folded conformers. The intramolecularly hydrogen bonded conformers are clearly visible even in CHCl3-EtOH mixtures. Folding occurs even in pure ethanol. As an indirect test, we studied the effectiveness of macrocyclization reactions in pure ethanol that require an effective templating effect to take place. The high yields obtained support the dominant role of a folded conformer even in this solvent.
A squaramide fluorescent ensemble for monitoring sulfate in water
作者:Rafel Prohens、Gabriel Martorell、Pablo Ballester、Antoni Costa
DOI:10.1039/b104172j
日期:——
A simple molecular sensor that uses the exclusive quenching and binding abilities of two squaramide units included within an anionic recognition site is proposed for monitoring sulfate in water.