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C, DEPT-135, HSQC, and HMBC NMR analyses confirm the presence of key intermediates, including amino alcohol and geminal diamine species, supporting the proposed mechanism. The results provide detailed insights into the interplay between protonation, solvation, and reactivity, offering a comprehensive mechanistic understanding of allantoin formation and guiding the rational design of related condensation processes.
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Kuznetsova et al. (2026) studied this question.
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