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QSRR modelling aimed on the HPLC retention prediction of dimethylamino- and pyrrolidino-substitued esters of alkoxyphenylcarbamic acid

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Abstract

Two homologous series of alkoxyphenylcarbamic acids esters with biological activities were subjected to the QSRR (Quantitative Structure–Retention Relationships) study. Retention factors of studied derivatives were measured in four different HPLC (High Performance Liquid Chromatography) systems. Experimental data in combination with in silico calculated molecular descriptors were used for development complex QSRR model for prediction of retention factor and partially for elucidation of separation mechanisms. The best results in QSRR modelling were given by artificial neural networks in the terms of developing one single robust model with high accuracy of logk prediction (\({Q}_{\mathrm{F}3}^{2}\) = 0.998) for all studied chromatographic systems. Chemometrical techniques were also used to elucidate the separation mechanisms occurring in the HPLC systems. We found similarities between particular systems and we identified systems which were the most suitable for separation of positional isomers of studied compounds. We observed that solvent significantly influenced the chromatographic separation of positional isomers depending on the used column, whereas combination of acetonitrile and C18-phenyl column caused suppression of π − π interactions, so retention was wholly determined by the hydrophobic interactions.

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Abbreviations

AcN:

Acetonitrile

ANN:

Artificial neural networks

CL:

Chain length

DPCA:

2-Dimethylamino ethyl esters of alkoxyphenylcarbamic acid

Etype:

Type of ester

HE:

Hydration energy

HPLC:

High-performance liquid chromatography

MeOH:

Methanol

MLR:

Multiple linear regression

MS:

Molecular surface

MV:

Molecular volume

MW:

Molecular weight

NUC:

Nucleodur-Sphinx C18-Phenyl column

PC:

Principal component

PCA:

Principal component analysis

Plr:

Polarizability

PPCA:

2-Pyrrolidine-1-yl-ethyl esters of alkoxyphenylcarbamic acid

Ptype:

Type of position

QSAR:

Quantitative structure–activity relationship

QSRR:

Quantitative structure–retention relationship

Ref:

Refractivity

RMSE:

Root mean square error

RP:

Reversed phase

SASA:

Solvent accessible surface area

YMC:

YMC-Triart C18 column

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Acknowledgements

This research was financially supported by VEGA 1/0048/19 and VEGA 1/0919/17.

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Correspondence to Petra Ranušová.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Ranušová, P., Nemeček, P., Lehotay, J. et al. QSRR modelling aimed on the HPLC retention prediction of dimethylamino- and pyrrolidino-substitued esters of alkoxyphenylcarbamic acid. Chem. Pap. 75, 2525–2535 (2021). https://doi.org/10.1007/s11696-020-01470-1

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  • DOI: https://doi.org/10.1007/s11696-020-01470-1

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