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The tartaric acid—glacial acetic acid system is found to be a simple, inexpensive and environmentally benign catalyst for the N-acetylation of primary aromatic amines.
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Pasricha, S., Rangarajan, T.M. Green Acetylation of Primary Aromatic Amines. Reson 28, 325–331 (2023). https://doi.org/10.1007/s12045-023-1551-2
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DOI: https://doi.org/10.1007/s12045-023-1551-2