4,4,9,9-Tetraphenyl pyrroloindolizine: a structural analogue of calix[2]pyrrole.

Synthesis and binding pattern of Calix[4]Pyrrole compounds

In this short review, focus has been on the improvisations in the synthetic procedures of the Calix[4] pyrrole type compounds, since their first discovery in the year 1886 and subsequent discussion on their binding pattern towards different chemical species. Calix[4] pyrrole, which is an analogue of hetero calixarenes, is the representative of a group of macrocycles. It has an ability to bind n...

Synthesis and anion binding studies of o-phenylenevinylene-bridged tetrapyrrolic macrocycle as an expanded analogue of calix[4]pyrrole.

An o-phenylenevinylene-bridged tetrapyrrolic macrocycle (2) was synthesized by means of a Horner-Wadsworth-Emmons reaction between benzylbisphosphonate and SEM-protected diformylpyrrole, followed by deprotection of the SEM groups. This conformationally flexible tetrapyrrole can be considered as an expanded calix[4]pyrrole analogue, which acts as a receptor for the chloride and bromide anions in...

Molecular recognition and self-assembly special feature: Self-assembly of dimeric tetraurea calix[4]pyrrole capsules.

Calix[4]pyrroles having extended aromatic cavities have been functionalized with 4 ureas in the para position of their meso phenyl substituents. This elaboration of the upper rim was completed in 2 synthetic steps starting from the alpha,alpha,alpha,alpha-tetranitro isomer of the calix[4]pyrrole obtained in the acid catalyzed condensation of p-nitrophenyl methyl ketone and pyrrole. In dichlorom...

Structural and Electronic Effects of Calix[n]pyrrole Based Anion Sensors

Further insight into the coordination of 2,5-dicarbothioamidopyrroles: the case of Cu and Co complexes.

The coordination chemistry of 2,5-dicarbothioamidopyrrole ligands, namely N2,N5-dibutyl-3,4-diphenyl-1H-pyrrole-2,5-bis(carbothioamide) and N2,N5,3,4-tetraphenyl-1H-pyrrole-2,5-bis(carbothioamide), has been investigated with Cu(II) metal centres by means of X-ray crystallography. This resulted in the formation of the expected planar S,N,S' coordinated complex for the former ligand and unexpecte...