Dextroamphetamine, a pharmacological marvel renowned for its efficacy in treating ADHD and narcolepsy, emerges from a sophisticated alchemy of chemical synthesis. Within the clandestine chambers of the laboratory, chemists wield their expertise to orchestrate a symphony of reactions, culminating in the creation of this potent stimulant.

The genesis of dextroamphetamine lies in the transformation of phenylacetone, a precursor notorious for its association with illicit drug synthesis. Yet, under the skilled hands of chemists, phenylacetone undergoes a metamorphosis, traversing a labyrinth of chemical pathways to emerge as amphetamine, the foundational scaffold upon which dextroamphetamine is built.

Central to this alchemical process is the delicate balance between stereochemistry and purity. Asymmetric synthesis techniques are employed to selectively yield the dextro enantiomer, harnessing the subtle nuances of chiral chemistry to isolate the desired molecular form. Through meticulous chiral resolution methods, chemists navigate the intricate landscape of molecular chirality, ensuring the therapeutic potency of the final product.

However, the journey towards dextroamphetamine is fraught with challenges, chief among them being racemization—the Achilles' heel of enantiopure synthesis. To circumvent this pitfall, chemists deploy an arsenal of protective measures, from utilizing robust chiral catalysts to implementing stringent purification protocols. Each step is executed with precision, safeguarding the integrity of the dextroamphetamine molecule against the perils of racemic contamination.

Beyond the confines of the laboratory, dextroamphetamine synthesis stands as a testament to scientific innovation and regulatory diligence. Stringent quality control measures, guided by Good Manufacturing Practices (GMP), ensure the safety and efficacy of the synthesized product, reinforcing its role as a cornerstone of modern pharmacotherapy.

In the intricate dance of molecules, dextroamphetamine synthesis unveils the profound artistry of chemical manipulation—a synthesis not merely of compounds, but of knowledge, skill, and dedication. As chemists continue to refine their craft, the quest for optimized synthesis methods persists, driven by the relentless pursuit of therapeutic excellence and scientific advancement.

Thus, Synthesis of dextroamphetamine sulfate and methamphetamine transcends the realm of mere chemical transformation, emerging as a testament to human ingenuity and the enduring quest to unravel the mysteries of nature's pharmacopeia. In its synthesis, we find not just a molecule, but a masterpiece—a testament to the boundless potential of science to transform lives and shape the future of medicine.