Weak Interactions in the Structures of Newly Synthesized (–)-Cytisine Amino Acid Derivatives

Przybył, Anna K.; Grześkiewicz, Anita M.; Kubicki, Maciej

doi:10.3390/cryst11020146

Cited by 2 publications

(2 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The topology (atoms-in-molecules [18]) of the electron density distribution was calculated using the MoPro software [30]. In our previous studies [31], we checked different models of electron density, and the superiority of the model with multipolar parameters transferred from the ELMAM2 database (experimental databank of transferable multipolar atom models) [31] was shown [32].…”

Section: Methodsmentioning

confidence: 99%

Weak Intermolecular Interactions in a Series of Bioactive Oxazoles

2021

Self Cite

View full text Add to dashboard Cite

The intermolecular interactions in a series of nine similar 4,5-phenyl-oxazoles were studied on the basis of crystal structures determined by X-ray diffraction. The crystal architectures were analyzed for the importance and hierarchies of different, weak intermolecular interactions using three approaches: the geometrical characteristics, topological analysis (for the model based on the transfer of multipolar parameters), and energetics of the molecule–molecule interactions. The geometries of the molecules were quite similar and close to the typical values. The results of the analysis of the interactions suggest that the number of nonspecific interactions is more important than the apparent strength of the specific interactions. The interactions involving covalently bound bromine and divalent sulfur atoms were classified as secondary, they certainly did not define the crystal packing, and they played a minor role in the overall crystal cohesion energies. Incidentally, another method for confirming the degree of isostructurality, according to the topologies of the interactions, is described.

show abstract

Section: Methodsmentioning

confidence: 99%

Weak Intermolecular Interactions in a Series of Bioactive Oxazoles

2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…These bands are related to the NH group of CYT which could be subjected to rotamerization producing two distinct bands (PubChem). Their disappearance therefore suggests that the NH group is involved in the interaction with the polymer [33]. As the Eudragit-CYT physical mixture (data not shown) resulted in the sum of the two single spectra, it is conceivable that the occurring drug-polymer interaction is due to the preparation method: the interaction might arise in solution and due to the gradual solvent evaporation it did not break.…”

Section: Characterization Of the Most Promising Cyt-loaded Buccal Filmsmentioning

confidence: 98%

Buccal Thin Films as Potent Permeation Enhancers for Cytisine Transbuccal Delivery

Angellotti

D’Agostino

et al. 2022

Membranes

View full text Add to dashboard Cite

Cytisine (CYT) is a powerful anti-smoking compound which could greatly benefit from transbuccal delivery because of both its unfavorable pharmacokinetics after oral administration and its intrinsic ability to permeate the buccal mucosa. This work aims to design CYT-loaded buccal thin films suitable for transbuccal drug delivery due to its capability of promoting the interaction between CYT and the buccal membrane. The solvent casting method was employed to prepare several thin films combining various excipients such as matrixing polymers, mucoadhesion agents, plasticizers and other compounds as humectants and sweeteners, component ratios and solvents. A total of 36 compositions was prepared and four of them emerged as the most promising in terms of aspect and flexibility. They all demonstrated homogeneity, thinness, low swelling degree, and controlled drug release according to the Power Law and Peppas-Sahlin mathematical models. Mainly, they proved able to interact with the ex vivo porcine buccal mucosa producing mucoadhesive effects, and act as potent permeation enhancers. In particular, Film B emerged as suitable as it produced a 10.6-fold Kp enhancement and a great Js value (52.33 μg/cm2·h−1), even when compared to highly concentrated CYT solutions.

show abstract

Weak Interactions in the Structures of Newly Synthesized (–)-Cytisine Amino Acid Derivatives

Cited by 2 publications

References 34 publications

Weak Intermolecular Interactions in a Series of Bioactive Oxazoles

Weak Intermolecular Interactions in a Series of Bioactive Oxazoles

Buccal Thin Films as Potent Permeation Enhancers for Cytisine Transbuccal Delivery

Contact Info

Product

Resources

About