Skip to main content
Log in

Quantum chemistry and metadynamics study of kinetic routes to alanine formation by CO or CO2 insertions in E- or Z-ethanimine isomers

  • Chemical Kinetics at micro-, meso-, macro-scales
  • Published:
Rendiconti Lincei. Scienze Fisiche e Naturali Aims and scope Submit manuscript

Abstract

Investigations of the synthesis of amino acids are crucial to the understanding of the chemical evolution of life and are of applied interest in biochemistry and pharmaceutical industry. Focus is here on extending the comprehension of their formation, studying by theoretical and computational procedures potential pathways for the synthesis of precursors of alanine. Amino acid is second in simplicity only to glycine and the simplest exhibiting chirality. Eight reaction paths were designed based on known experimental features and on theoretical grounds. For their study, stationary and dynamical quantum mechanical methods were used. For the first set of four reactions examined, E-ethanimine and Z-ethanimine reacted with carbon monoxide forming R- and S-alanine precursors, each process considered as evolving upon two planes of approach. For the other set of four reactions, the ethanimine isomers reacted with carbon dioxide. For all reactions, the chirality of the alanine precursors was also analyzed. Calculations of geometries and energies of the stationary points (reactants, products, van der Waals complexes and transition states) for all reactions were processed, as well as their thermodynamical state functions. The Z-ethanimine and CO reactions were found to be favored. Preferential channels for the chiral center formation were not identified. Biased first-principle molecular dynamics simulations (metadynamics) were carried out to provide the enantiomeric control of the reactions and the formation of other possible remarkable structures: initially 80 metadynamics simulations were performed. They confirmed the precursors of alanine found in the static calculations, but also found additional ones. In general, the last steps of the simulation culminated in simpler and less reactive substances. Our results individuated feasible reaction pathways to precursors of alanine synthesis, although no evidence was obtained of favoring homochiral selectivity. However, insertion of CO and CO2 into ethanimines was considered, with these molecules being of primordial interest, and both were shown to be orientable in gaseous flow, so arguably relevant to the emergence of chirality by a stereodynamic mechanism.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7

Similar content being viewed by others

References

Download references

Acknowledgements

The authors are grateful for the support given by Brazilian agency CAPES. This research is also supported by the High-Performance Computing Center at the Universidade Estadual de Goiás, Brazil. We thank Professor Vincenzo Aquilanti for valuable discussions.

Author information

Authors and Affiliations

Authors

Contributions

MARNS: investigation, formal analysis, writing—original draft preparation, NDC: investigation, formal analysis, WAdaS: formal analysis, review and editing, VHCS: investigation, supervision, conceptualization, formal analysis, reviewing.

Corresponding author

Correspondence to Valter H. Carvalho-Silva.

Ethics declarations

Conflict of interest

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

This peer-reviewed paper belongs to the Topical Collection originated from contributions to the conference held in Rome, March 27–28, 2023, promoted by Accademia Nazionale dei Lincei and Fondazione Guido Donegani on Chemical Kinetics at Micro-, Meso-, Macroscales, dedicated to Giangualberto Volpi (1928- 2017, Linceo from1994).

Rights and permissions

Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Nogueira-da-Silva, M.A.R., Coutinho, N.D., da Silva, W.A. et al. Quantum chemistry and metadynamics study of kinetic routes to alanine formation by CO or CO2 insertions in E- or Z-ethanimine isomers. Rend. Fis. Acc. Lincei 34, 1021–1030 (2023). https://doi.org/10.1007/s12210-023-01199-5

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s12210-023-01199-5

Keywords

Navigation