[EN] NEW CALIX ARENE COMPOUNDS, THEIR PROCESS OF PREPARATION AND THEIR USE, PARTICULARLY AS ENZYMATIC MIMES [FR] NOUVEAUX COMPOSES DE CALIX ARENES, LEUR PROCEDE DE PREPARATION ET LEUR UTILISATION, NOTAMMENT EN TANT QUE MIMES ENZYMATIQUES
Unprecedented Selective <i>ipso</i>-Nitration of Calixarenes Monitored by the <i>O</i>-Substituents
作者:Sophie Redon、Yun Li、Olivia Reinaud
DOI:10.1021/jo034557j
日期:2003.9.1
carboxylic acid), situated in the gamma or epsilon position of the phenoxy moieties, deactivates the corresponding aromatic ring by removing electron density through intramolecular hydrogen bonding. The high control operated by the O-substituents at the small rim even allowed the selective ipso-nitration of partially detertiobutylated calixarene 1(H3). Hence, these findings open new routes to a wide range of
aim of designing graftablecalix[6]tren-based receptors, calix[6]trenamides decorated with an appended functional arm were synthesized through [1+1] macrocyclization reactions between calix[6]trisamines and NTA-lysine derivatives. NMR spectroscopy and ESI-MS studies showed that one of these calix[6]trenamides, 5, behaves as a unique heteroditopic receptor towards charged or neutral species. Notably
[EN] NEW CALIX ARENE COMPOUNDS, THEIR PROCESS OF PREPARATION AND THEIR USE, PARTICULARLY AS ENZYMATIC MIMES<br/>[FR] NOUVEAUX COMPOSES DE CALIX ARENES, LEUR PROCEDE DE PREPARATION ET LEUR UTILISATION, NOTAMMENT EN TANT QUE MIMES ENZYMATIQUES
申请人:CENTRE NAT RECH SCIENT
公开号:WO2004085441A1
公开(公告)日:2004-10-07
The present invention relates to new calix arene compounds of formula (I). It also relates to their process of preparation. The present invention also relates to complexes between a compound of formula (I) and an element chosen among a metal, an actinide, a radioelement, a cationic guest or an anionic guest. The present invention also relates to a pharmaceutical composition comprising a compound of formula (I) in association with a pharmaceutically acceptable carrier. The present invention also relates to a process of preparation of water-soluble compounds, comprising a reaction of nitration or sulfonation or nitration, particularly of compounds of formula (I), and also to the compounds such as obtained.
The ipso-nitration of calix[6]arene-based molecular receptors is a important synthetic pathway for the elaboration of more sophisticated systems. This reaction has been studied for a variety of capped calixarenes, and a general trend for the regioselective nitration of three aromatic units out of six in moderate to high yield has been observed. This selectivity is, in part, attributed to the electronic connection between the protonated cap at the small rim and the reactive sites at the large rim. In addition, this work highlights the fact that subtle conformational properties can drastically influence the outcome of this reaction.