When the compound is treated with triethylamine (TSCI) in the presence of pyridine, an acylation reaction occurs. The TSCI acts as a coupling agent that allows the introduction of an acyl group to the compound. This step generally results in the formation of an activated carbonyl compound.
Next, when sodium bromide (NaBr) is introduced, a substitution reaction takes place where the bromide ion replaces any leaving group in the structure. The stereochemistry of the product needs to be considered to specify the orientation of substituents around the chiral centers that may exist.
The resulting structure will depend on the starting material used and the orientation during the reaction steps. If a stereocenter is formed or modified during the process, the stereochemistry will influence the final product’s spatial configuration.
Finally, the overall product structure will include the introduced acyl group, the bromine atom, and the surrounding molecular framework, maintaining the correct stereochemical orientation based on the reagents used.