Título:	Quantitative ¹H NMR spectroscopy (qNMR) in the early process development of a new quorum sensing inhibitor
Autor(es):	Cavalcante, Robson Alves Fernandes Silva, Felipe L. Favero, Fernanda Resck, Inês Sabioni Pereira, Alex Leite Machado, Angelo Henrique de Lira
ORCID:	https://orcid.org/0000-0002-0537-2482 https://orcid.org/0000-0002-0346-7146 https://orcid.org/0000-0003-4284-9929
Assunto:	Controle de processo Desenvolvimento de processo Ressonância magnética nuclear
Data de publicação:	2020
Editora:	Wiley
Referência:	CAVALCANTE, Robson Alves Fernandes. Quantitative ¹H NMR spectroscopy (qNMR) in the early process development of a new quorum sensing inhibitor. Magnetic Resonance in Chemistry, v. 58, p. 31-40, 2020. DOI: https://doi.org/10.1002/mrc.4906.
Abstract:	2-methyl-5,6,7,8-tetrahydro-2H-chromen-4(3H)-one (called 6-oxo) is presented as a new AI-1 quorum sensing inhibitor for Vibrio harveyi. The development of a chemical process to afford traceable materials for new biological assays demands the development of analytical methods to ensure their purity and quality. This work describes the use of quantitative 1H nuclear magnetic resonance (NMR) spectroscopy (qNMR) to assess the purity of a sample of 6-oxo (99.88%) and a sample of its major process impurity (E)-1-(2-hydroxycyclohex-2-en-1-yl)but-2-en-1-one (called HCB; 98.28%). To explore the scope of the use of qNMR to quantify the amount of low-content components in samples related to the chemical process for 6-oxo synthesis, this work also determined the amount of 6-oxo in two HCB samples: (a) the high-purity HCB sample described above and (b) a crude HCB sample collected during the chemical process. Despite the complexity of the crude sample, the amount of 6-oxo was readily assessed and could help to estimate the extent to which 6-oxo was already formed during the HCB synthesis. This information can help the understanding of how the process parameters can be modified to improve the performance of the whole process, by controlling the reaction mechanisms working at each step of this chemical process. In this context, our results reinforce qNMR as a complementary analytical tool for the quantification of the main component found in a sample, contributing to the standardization of reference materials and thus allowing the development of analytical methods for process control and traceability of the samples used for biological assays.
Unidade Acadêmica:	Instituto de Química (IQ)
DOI:	https://doi.org/10.1002/mrc.4906
Versão da editora:	https://analyticalsciencejournals.onlinelibrary.wiley.com/doi/abs/10.1002/mrc.4906
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