1796-25-4Relevant articles and documents
Synthesis and in vivo anti- or pro-inflammatory activity of new bisphosphonates and vinylphosphonates
Ramírez-Marroquín, Oscar Abelardo,Jiménez-Arellanes, María Adelina,Cortés-Pacheco, Abimelek,Zambrano-Vásquez, Oscar R.,López-Torres, Adolfo
, p. 267 - 274 (2019)
Abstract: We herein report the synthesis and in vivo anti-inflammatory activity of a series of new bisphosphonate and vinylphosphonate derivatives of pyrrolidine and piperidine through a short route of synthesis. The C-alkylation of tetraethylmethylene diphosphonate with N-(bromoacetyl)pyrrolidine or N-(bromoacetyl)piperidine, respectively, yielded the corresponding α-substituted bisphosphonates in excellent yields (82–89%). Next, the Horner–Wadsworth–Emmons reaction of these bisphosphonates with aromatic aldehydes afforded final vinylphosphonates in moderate yields (26–36%). Synthesized bisphosphonates and vinylphosphonates were tested by two models of acute inflammation in male BalB/c mice, founding excellent edema inhibition by topical TPA (12-O-tetradecanoylphorbol-13-acetate) model (67.53–72.10% in comparison with indomethacin = 64.89%). However, remarkably pro-inflammatory effect by systematic carrageenan model (??9.78 to ??36.18) was observed, probably due to biotransformation. In conclusion, the new vinylphosphonates emerged as attractive topical anti-inflammatory compounds that “twist” its pharmacological activity to route of administration. Further research is needed to understand the dual effect.
Stabilising Peptoid Helices Using Non-Chiral Fluoroalkyl Monomers
Gimenez, Diana,Aguilar, Juan A.,Bromley, Elizabeth H. C.,Cobb, Steven L.
, p. 10549 - 10553 (2018)
Stability towards protease degradation combined with modular synthesis has made peptoids of considerable interest in the fields of chemical biology, medicine, and biomaterials. Given their tertiary amide backbone, peptoids lack the capacity to hydrogen-bond, and as such, controlling secondary structure can be challenging. The incorporation of bulky, charged, or chiral aromatic monomers can be used to control conformation but such building blocks limit applications in many areas. Through NMR and X-ray analysis we demonstrate that non-chiral neutral fluoroalkyl monomers can be used to influence the Kcis/trans equilibria of peptoid amide bonds in model systems. The cis-isomer preference displayed is highly unprecedented given that neither chirality nor charge is used to control the peptoid amide conformation. The application of our fluoroalkyl monomers in the design of a series of linear peptoid oligomers that exhibit stable helical structures is also reported.
Exploring packing features of N-substituted acridone derivatives: Synthesis and X-ray crystallography studies
Hussain, Javeena,Sahrawat, Parul,Dubey, Pankaj,Kirubakaran, Sivapriya,Thiruvenkatam, Vijay
, (2022)
The title compounds include an acridone as a parent molecule in which nitrogen is linked to other nitrogen-containing heterocyclic molecules through two carbon chain alkyl linkers connected by a C—N single bond. These acridone derivatives crystallized as Triclinic, Monoclinic, Tetragonal, and Orthorhombic having space group P1, P21/c, I41/a, Pca21, respectively at T = 273 K. In the present work, synthesis and single-crystal X-ray crystallographic study of four novel acridone derivatives are reported from the perspective of crystal engineering. This work is based on the comprehensive analysis of Hirshfeld surfaces, 2D fingerprint plots, and DFT studies. The single-crystal structure analysis showed that compounds are connected by various intermolecular interactions such as C – H?O, C – H?C/π, and π?π (C?C) stacking interactions, which are accountable for the arrangement and amplification of molecular assembly. The DFT studies using the B3LYP functional with the 6-311++ G (d,p) basis set are employed to compare the experimental results with theoretically obtained molecular parameters. The HOMO and LUMO analyzes were used to elucidate information regarding molecular reactivity and charge transfer within the molecule.
Biomimetic synthesis and anti-inflammatory evaluation of violacin A analogues
Wu, Wenxi,Mu, Yu,Liu, Bo,Wang, Zixuan,Guan, Peipei,Han, Li,Jiang, Mingguo,Huang, Xueshi
, (2021/04/23)
Violacin A, a chromanone derivative, isolated from a fermentation broth of Streptomyces violaceoruber, has excellent anti-inflammatory potential. Herein, a biogenetically modeled approach to synthesize violacin A and twenty-five analogues was described, which involved the preparation of aromatic polyketide precursor through Claisen condensation and its spontaneous cyclization. The inhibitory effect on nitric oxide (NO) production of all synthetic molecules was evaluated by lipopolysaccharide (LPS)-induced Raw264.7 cells. The results revealed that introduction of aliphatic amine moieties on C-7 obviously improved the anti-inflammation effect of violacin A, and also the aromatic ether instead of ketone group at side chain was favorable to increase the activity. Among them, analogue 7a and 16d were screened as the most effective anti-inflammatory candidates. Molecular mechanism research revealed that 7a and 16d acquired anti-inflammatory ability due to the inhibition of NF-κB signaling pathway.
