Drug Delivery with a Calixpyrrole–trans-Pt(II) Complex
摘要:
A meso-p-nitroaniline-calix[4]pyrrole derivative trans-coordinated to a Pt(II) center was synthesized and its structure solved by X-ray analysis. Adenosine monophosphate (AMP) was used as a model compound to evaluate the potential for the assisted delivery of the metal to the DNA nucleobases via the phosphate anion-binding properties of the calix[4]pyrrole unit. An NMR investigation of the kinetics of AMP complexation in the absence of an H-bonding competing solvent (dry CD3CN) was consistent with this hypothesis, but we could not detect the interaction of the calix[4]pyrrole with phosphate in the presence of water. However, in vitro tests of the new trans-calixpyrrole- Pt(II) complex on different cancer cell lines indicate a cytotoxic activity that is unquestionably derived from the coexistence of both the trans-Pt(II) fragment and the calix[4]pyrrole unit.
Thermodynamic Characterization of Halide−π Interactions in Solution Using “Two-Wall” Aryl Extended Calix[4]pyrroles as Model System
作者:Louis Adriaenssens、Guzmán Gil-Ramírez、Antonio Frontera、David Quiñonero、Eduardo C. Escudero-Adán、Pablo Ballester
DOI:10.1021/ja412098v
日期:2014.2.26
interactions in solution. We base this research on the thermodynamic characterization of a series of 1:1 complexes formed between halides (Cl(-), Br(-), and I(-)) and several α,α-isomers of "two-wall" calix[4]pyrrole receptors bearing two six-membered aromatic rings in opposed meso positions. The installed aromatic systems feature a broad range of electron density as indicated by the calculated values for their
Tuning the anion binding properties of calixpyrroles by means of p-nitrophenyl substituents at their meso-positions
作者:Giuseppe Bruno、Grazia Cafeo、Franz H. Kohnke、Francesco Nicolò
DOI:10.1016/j.tet.2007.07.060
日期:2007.10
Extended cavity calix[4]pyrroles and a calix[6]pyrrole were synthesized by cyclization of 5-methyl-5-(4-nitrophenyl)dipyrromethane with acetone in the presence of acid. The solid-state structures of the novel macrocycles were determined by X-ray crystallography. The host–guest chemistry of these receptors towards halide ions was investigated in solution by 1H NMR titration techniques and compared with
在酸存在下,通过丙酮将5-甲基-5-(4-硝基苯基)二吡咯甲烷环化,合成了长腔杯杯[4]吡咯和杯[6]吡咯。新型大环化合物的固态结构通过X射线晶体学测定。这些受体对卤离子的主客体化学是通过在溶液中研究1种1 H NMR滴定技术,并与那些的内消旋-octamethylcalix [4]吡咯和内消旋-dodecamethylcalix [6]吡咯。在这里描述的新型杯[6]吡咯衍生物的两个面上观察到氯阴离子的结合发生了不同的亲和力。
Efficient organocatalysis with a calix[4]pyrrole derivative
作者:Grazia Cafeo、Margherita De Rosa、Franz H. Kohnke、Placido Neri、Annunziata Soriente、Luca Valenti
DOI:10.1016/j.tetlet.2007.10.148
日期:2008.1
The 10 alpha,20 beta-bis(4-nitrophenyl)-calix[4]pyrrole was found to act as an effective organocatalyst for the hetero Diets-Alder reaction of Danishefsky's diene with aromatic aldehydes. This discovery is the first reported case of a calixpyrrole that exhibits organocatalytic activity. (c) 2007 Elsevier Ltd. All rights reserved.
Quantification of Nitrate−π Interactions and Selective Transport of Nitrate Using Calix[4]pyrroles with Two Aromatic Walls
Herein we disclose the results investigations regarding the interactions between the biologically relevant nitrate oxoanion and several "two-wall" aryl-extended calix[4]pyrroles. There exists a clear relationship between the electronic nature of the aromatic walls of the calix[4]pyrroles and the stability of the nitrate subset of calix[4]pyrrole complex. This suggests that NO3--pi interactions have an important electrostatic component. We provide energetic estimates for the interaction of nitrate with several phenyl derivatives. Additionally, we report solid-state evidence for a preferred binding geometry of the nitrate anion included in the calix[4]pyrroles. Finally, the "two-wall" aryl-extended calix[4]-pyrroles show excellent activity in ion transport through lipid-based lamellar membranes. Notably the best anion transporters are highly selective for transport of nitrate over other anions.
Drug Delivery with a Calixpyrrole–<i>trans</i>-Pt(II) Complex
作者:Grazia Cafeo、Grazia Carbotti、Angela Cuzzola、Marina Fabbi、Silvano Ferrini、Franz H. Kohnke、Georgia Papanikolaou、Maria Rosaria Plutino、Camillo Rosano、Andrew J. P. White
DOI:10.1021/ja307791j
日期:2013.2.20
A meso-p-nitroaniline-calix[4]pyrrole derivative trans-coordinated to a Pt(II) center was synthesized and its structure solved by X-ray analysis. Adenosine monophosphate (AMP) was used as a model compound to evaluate the potential for the assisted delivery of the metal to the DNA nucleobases via the phosphate anion-binding properties of the calix[4]pyrrole unit. An NMR investigation of the kinetics of AMP complexation in the absence of an H-bonding competing solvent (dry CD3CN) was consistent with this hypothesis, but we could not detect the interaction of the calix[4]pyrrole with phosphate in the presence of water. However, in vitro tests of the new trans-calixpyrrole- Pt(II) complex on different cancer cell lines indicate a cytotoxic activity that is unquestionably derived from the coexistence of both the trans-Pt(II) fragment and the calix[4]pyrrole unit.